Malicious PDF — malware analysis report

Static analysis result for SHA-256 ff10f23c25c5c331…

MALICIOUS

PDF

54.9 KB Created: 2020-08-31 05:42:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: 9d130fbe6addb3260ba66cb84d334635 SHA-1: a97cec7241ff761e1951cb97a3e6f3f5017d853d SHA-256: ff10f23c25c5c33115149d52d463b3f71ebcb72d4d78c6214e291bb5cc045350
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF was flagged by multiple heuristics as malicious, specifically for containing a link to a known malicious redirector at 'https://ttraff.com/wix?keyword=fonema+r+suave+eliminar'. The document also contains a large number of external PDF links, many hosted on static.usrfiles.com, suggesting a link farm or SEO poisoning attempt. The ML classifier strongly supports the malicious verdict. No scripts were extracted, and the document body is heavily obfuscated, but the presence of the malicious redirector is a strong indicator of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://ttraff.com/wix?keyword=fonema+r+suave+eliminar In PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static.usrfiles.com/ugd/b8c837_d7ef624ea4c24ec9b07957656968102d.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b8c837_b3fef2bdc9964125807655ed9b5e839e.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b8c837_20ef6ccba5964ecfb694e2da3c44c52b.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/a18aa6_26f41e8387d44b0e944ac05c01232bfb.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6719/5040/files/kejibupoketogebisizomogil.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/5693/1751/files/le_journal_d_aurelie_laflamme_tome_1.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/2614/4670/files/21053743629.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/2f3ac6_8de05ba7d2054dca8d67c782f62dd552.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/43d598_346c51631336481e924e4ce9f03093ef.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/3f4b99_975f0380ecd54492ab391e82f70ec55c.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/451a43_e4ea1588978c4818a31df7499feebe2a.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0552/5661/files/vujebuzuzizutedurerekafa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6268/8918/files/zetupemi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8694/6206/files/83423497559.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/3834/3322/files/nubogom.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/9168/8610/files/60739353893.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • https://savannah.gnu.org/projects/freefont/In PDF document text
    • http://www.gnu.org/licenses/In PDF document text
    • http://www.gnu.org/copyleft/gpl.htmlIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006319.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6319 6568 bytes
SHA-256: 18f4960a52d64bc83d6c304eee4b25c9ca37eec54c0f4efd5701b5568bea1fd1
font_01_sfnt_off00007368.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7368 4848 bytes
SHA-256: 18d17102e0c8e6d25fdd1fd3f047cc39c48343e2db2d149d42288db5b027dfa7
font_02_sfnt_off000083bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x83BD 3260 bytes
SHA-256: 1de02c2199b601e14817e82402db2382a0a8fc899f49f965d7e82b23e069b554
font_03_sfnt_off000090f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x90F7 11412 bytes
SHA-256: 44e116141ef8754405dd10b903168e075824c36f7ba5286872d0cbc238c5052a
font_04_sfnt_off0000b68a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB68A 16324 bytes
SHA-256: 55db1795a335ababb809e11894f2738b68b50beb681efebf21149f0dce1d66d8

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