Malicious PDF — malware analysis report

Static analysis result for SHA-256 ddd690e5d33c58d9…

MALICIOUS

PDF

50.1 KB Created: 2020-08-30 01:03:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 47a1f0e3ad5e9e5d3576b3db0676d474 SHA-1: c8d3f18e669f61a6f51fb2ecf9b58843cb259533 SHA-256: ddd690e5d33c58d9ed78dd015718f8999f11be0a1d8b458d46b8c7bfdad3fe26
194 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, with one identified as a malicious redirector. The document body, though heavily obfuscated, contains the malicious URL. This suggests the primary goal is to redirect the user to malicious infrastructure, likely for further exploitation or credential harvesting.

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.cc/wix?keyword=como+se+escribe+supervision+de+supervisar 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_131aae11a9d54ad39cb1a4ef21c1cdca.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/0d002d_1ef4c68a55f346f4858930992e72da0f.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b8c837_8d6882410fd848d0a33e1b415cfd021a.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/a59130_7d908bfc4276436d9a062e9e427f83df.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b8c837_e6ddba01e4ed4dab961798c8a11b3927.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/0181/2904/files/karthus_pro_builds.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2457/9751/files/maybe_from_annie_lyrics.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/76222514852.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/tomazemajetel.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b8c837_f0f6d74d10bc47bdb90ccbb503061549.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b8c837_dc4e1d3c30f24c46a999aafbd0482c6e.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/d54300_0f9d2774ce384a59bbe9caba604f92f7.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b8c837_45dcab2377b64da098b61069f1516db4.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b8c837_479b3f72c64e40299062c282b159bf7e.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8078/5821/files/76577661519.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2654/5820/files/april_2019_blank_calendar.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/3942/4669/files/2338949901.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9078/9020/files/39514403592.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/0669/5320/files/38725266080.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000068f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x68F6 5292 bytes
SHA-256: 6b921c20b31e25d41f2c84984d911ed18f65f14dc37bb62d2e14b1528fef2e0c
font_01_sfnt_off00007ad6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7AD6 12864 bytes
SHA-256: f5e94d0ceb7cceba8e5c58fe1c52ce77e0b85a44932c01e79cd6580322445d6e
font_02_sfnt_off0000a3d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA3D7 16200 bytes
SHA-256: 7427c6bc67859b578149a261544bb1535a5c5cc5499c5bcf465df30433ecb59a