Malicious PDF — malware analysis report

Static analysis result for SHA-256 34e93c92dae9f4b4…

MALICIOUS

PDF

42.5 KB Created: 2020-09-06 02:51:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 5c4d5f3dfac9f32a6ed5df2762d9c005 SHA-1: d001a1a7ddd81affeca8ab56555f47a454f5798a SHA-256: 34e93c92dae9f4b4f63cfe3f17f72ce52b2fd62cb52332b26ad611ca4c19b71c
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a large number of external links, many pointing to Shopify-hosted PDFs, suggesting a link farm or SEO abuse tactic. One prominent link, 'https://ttraff.club/pify?keyword=dust+bowl+map+worksheet+answers', is identified as a malicious redirector. The document body, though heavily obfuscated, contains this URL and other Shopify links, indicating an attempt to lure users to malicious infrastructure under the guise of providing worksheet answers. No scripts were extracted, but the presence of embedded URLs and the malicious redirector strongly suggest a phishing or redirection attack.

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.club/pify?keyword=dust+bowl+map+worksheet+answers 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/1/0436/7079/8489/files/91384748302.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2902/0317/files/wijebibumino.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/2231/7730/files/9mm_semi_automatic_pistols_with_manual_safety.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0441/3590/7480/files/42237951590.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/8d5d69_456890b3f5034e3ea2c4636eb08c4ba8.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/8bc2a6_8c50bb6b292d48778433540eb45f1d5b.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/12745a_9135a017023846229afe2c7c50900995.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/921909_10fedf26d9924de481cf6f72f0cd6cfd.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6469/6738/files/lowipajisoterumaj.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0462/6645/0074/files/vebegote.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/3e9e83_5a2b5da17f6142c9bae01f854342f2e1.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b914b5_56c81cd65d9547968ada1909650174f8.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/838e7e_b2b3030cdd0741d5ba05d5774ff08b92.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/eb6612_577bf5f08781455bb2f3ce0a411bfd70.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/9421c8_fa83f34885be47f7a14b74f80a1b5008.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_off0000671c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x671C 5356 bytes
SHA-256: 27af41914a26536287bfe5c10452c84604e1578da82550c1e86758d98707f94e
font_01_sfnt_off00007936.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7936 10596 bytes
SHA-256: fa466b2168a64435c07a2bd9949c83c8456afa50b88cab0514ceeaebae526e19

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