Malicious PDF — malware analysis report

Static analysis result for SHA-256 1075e8b71d16060f…

MALICIOUS

PDF

43.6 KB Created: 2020-08-12 13:12:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: eb4520f6b43e3631a155e698c9753723 SHA-1: b8f2349084d0925a019751ad9420b2a37d563279 SHA-256: 1075e8b71d16060fb0facd89b06b443a942225c4ab130c7e57da66516fe1eee2
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file contains a large number of embedded links, many pointing to Shopify domains, suggesting a link farm or SEO manipulation tactic. One critical heuristic identified a link to known malicious redirector infrastructure at 'https://ttraff.ru/pify?keyword=how+can+i+search+for+pdf+files+in+google'. The ML classifier also strongly flagged this PDF as malicious. The document body itself contains the same query string, reinforcing the lure.

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=how+can+i+search+for+pdf+files+in+google
    • http://files.spaghettifactory.net/uploads/1/3/1/6/131606465/nojetipetelamolipu.pdf
    • http://files.aberdeenlatinschool.com/uploads/1/3/1/8/131856725/8966318.pdf
    • http://files.rbawebdesign.com/uploads/1/3/0/7/130740213/kojobesawetesog.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/7300/2906/files/napidumividore.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/japoxotoruzub.pdf
    • https://cdn.shopify.com/s/files/1/0431/7069/3284/files/tifebam.pdf
    • https://cdn.shopify.com/s/files/1/0440/5588/8022/files/lezojixipotumejunuxevudo.pdf
    • https://cdn.shopify.com/s/files/1/0436/8403/6761/files/20741019306.pdf
    • https://cdn.shopify.com/s/files/1/0432/7990/9030/files/nanocrystalline_cellulose.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/dedijadexurusefux.pdf
    • https://cdn.shopify.com/s/files/1/0430/8559/4775/files/17407427496.pdf
    • https://cdn.shopify.com/s/files/1/0439/1688/6184/files/14589239023.pdf
    • https://cdn.shopify.com/s/files/1/0434/4935/2349/files/visut.pdf
    • https://cdn.shopify.com/s/files/1/0429/5042/6780/files/pafemod.pdf
    • https://cdn.shopify.com/s/files/1/0433/9187/7283/files/nixukezukujekikogomaku.pdf
    • https://cdn.shopify.com/s/files/1/0429/6137/1290/files/68724726735.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_off00006b25.bin
726540547bf51df60ed50c37f63aa5939c4e143fb0a11ceb897795ae7c14e966		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6B25 5468 bytes
font_01_sfnt_off00007dc3.bin
1b3a1e7ed09b067c8dc08c64ed8548ca80eaae24a994883c22504c3747052a7a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7DC3 10392 bytes

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