Malicious PDF — malware analysis report

Static analysis result for SHA-256 111c3dc9e0a203db…

MALICIOUS

PDF

35.6 KB Created: 2020-08-06 18:14:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ce21a33e6b88248e2fbd96b7bef02f1c SHA-1: 3bcf06882809fbd48e089109af859db2f2e692da SHA-256: 111c3dc9e0a203db943d620107ee6e2f2e59e6240575079e0d61da098344ffbe
154 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, `https://ttraff.ru/pify?keyword=icse+class+11+biology+book+pdf`, which is designed to lead users to malicious content. The document also contains a large number of links to other PDFs hosted on Shopify, suggesting a link farm or SEO manipulation tactic. The ML classifier strongly flagged this PDF as malicious, indicating a high probability of malicious intent.

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.ru/pify?keyword=icse+class+11+biology+book+pdf
    • http://dosad.stcolumbahawaii.org/uploads/1/3/2/7/132740541/6f49893f7.pdf
    • http://files.damnearcabins.com/uploads/1/3/1/4/131408899/fozale_jatuzepasavabi_jilunegi.pdf
    • http://files.ahartymeal.ca/uploads/1/3/0/9/130969389/guzajuta-tipikajogisuk.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/7857/3464/files/64820947174.pdf
    • https://cdn.shopify.com/s/files/1/0430/8058/1274/files/9906893591.pdf
    • https://cdn.shopify.com/s/files/1/0428/1604/5222/files/46208150646.pdf
    • https://cdn.shopify.com/s/files/1/0439/2806/0059/files/virgilio_bucoliche.pdf
    • https://cdn.shopify.com/s/files/1/0433/4472/4133/files/nejir.pdf
    • https://cdn.shopify.com/s/files/1/0432/0120/0288/files/fitenevujebubej.pdf
    • https://cdn.shopify.com/s/files/1/0441/0572/8152/files/enron_corporation_case_study.pdf
    • https://cdn.shopify.com/s/files/1/0434/8100/6244/files/mizoruw.pdf
    • https://cdn.shopify.com/s/files/1/0435/9297/4499/files/mac_address_on_macbook.pdf
    • https://cdn.shopify.com/s/files/1/0428/9773/5843/files/manilobod.pdf
    • https://cdn.shopify.com/s/files/1/0430/9313/1425/files/78510508902.pdf
    • https://cdn.shopify.com/s/files/1/0428/8957/6601/files/womakutudoduxavetegafajan.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/6819160869.pdf
    • https://cdn.shopify.com/s/files/1/0434/2494/0184/files/basic_digital_electronics_tutorial.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004cbb.bin
615375374942294678dd46f1a061ab0aca6aa7fad8c5b2d03713a079229d6a11		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4CBB 5524 bytes
font_01_sfnt_off00005fac.bin
06a7251777ade11abbb1fe38c0bbfbb5e5f25afd5643e82d85bb172ee42e14c3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5FAC 9880 bytes

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