Malicious PDF — malware analysis report

Static analysis result for SHA-256 3d4b2b11f3a33438…

MALICIOUS

PDF

39.7 KB Created: 2020-09-08 12:34:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 85e3e4027c1ef35228660546abab42d5 SHA-1: 6ab481292e16032cdefd5ba1c72f68481f215ac0 SHA-256: 3d4b2b11f3a334386241e2cba1322ae02a4273f2a24d2351d2a05b574cb400b9
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links, many of which point to Shopify domains hosting other PDFs, suggesting a link farm or SEO manipulation tactic. One critical heuristic identified a link to a known malicious redirector, ttraff.link, which is likely the primary malicious objective. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • 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.link/pify?keyword=norme+iso+9001+version+2015+afnor+pdf In 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/1/0432/9072/2469/files/dd214_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7646/0447/files/63438192644.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/3519/7602/files/kobibapusopuxuvusamo.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b8c837_cd89032216554cb8b1325b4d3bef9d83.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/5be868_bb5fe76832c14ca68e0d788c5d329046.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/4532/9832/files/68628816369.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/7831/0306/files/emulator_8086_crack_free.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5112/1820/files/33671446971.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/5386/7427/files/zidubilupuvemegajugati.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4107/1016/files/ejercicios_de_categorias_gramaticales_resueltos.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/8de238_d2e58c65f9794ebba07652af8d48e9c2.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/1df9ea_9a6dc26402ae4cd5a387505fc459f613.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/37987b_8e2877460504440e9762ae107c4ab29c.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b8c837_77c4971fca9f41638db2f3f9bb6d221b.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005c46.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5C46 5788 bytes
SHA-256: 50e3681041e4678a2f9eae775c6dce08e976cf7423a143080848f9f75869e53a
font_01_sfnt_off00006ff6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6FF6 10016 bytes
SHA-256: 49885635ce1c1be58bc7ead3e0ded1f93b09ac7b63aee80cf7e0a1b0b39b73a1

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