Malicious PDF — malware analysis report

Static analysis result for SHA-256 a609b61aff9f2878…

MALICIOUS

PDF

81.5 KB Created: 2020-07-29 09:42:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 1dec2d92b57e4c5bcd2e849967b4fbc6 SHA-1: e356116d7ec26985e5b697102b0d54cba51d245f SHA-256: a609b61aff9f28784d4aee3f287ae515a4b53f9a1a1218cb086fc381797296cc
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains multiple embedded links, with one specifically pointing to a known malicious redirector. The ML classifier also strongly flagged this PDF as malicious. The document body, though heavily obfuscated, contains text related to 'dictionary google translate' and application metadata, suggesting a lure to a malicious site for potentially deceptive content or further exploitation.

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.ru/pify?keyword=dictionary+google+translate In PDF document text
    • http://files.insurancehousewales.co.uk/uploads/1/3/0/7/130740586/nubawotekifiwig.pdfIn PDF document text
    • http://files.suzonspice.com/uploads/1/3/2/7/132710784/mezapibazogir_mabosem_jipadipibos_venud.pdfIn PDF document text
    • http://files.fredswansonbooks.com/uploads/1/3/2/8/132815123/3852127.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4296/3613/files/69973719256.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6217/3602/files/mapozigi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6753/9623/files/gadosowotebabawuxefot.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6961/1932/files/14756204788.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/3831/9527/files/gasufogupa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/1290/6405/files/21376114507.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/4672/1946/files/57700732849.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6320/6307/files/62820762529.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6640/8603/files/rimuzerumukukupiwoti.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6146/9596/files/sorosuxutu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5031/9528/files/8456266588.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
    • http://scripts.sil.org/OFLIn PDF document text
🗂 Part of campaign: fredswansonbooks.com 6 samples

Related samples 4

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

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010686.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10686 4856 bytes
SHA-256: 6fef3a4c436af248a912f50882b59cee5e4526d92a448234e76a1f0dd05b9cf5
font_01_sfnt_off00011718.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11718 9824 bytes
SHA-256: bc172ced8c46a9156495060ef1c6fcaa1af82380081177b3d51fc2ba7379d205

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