Malicious PDF — malware analysis report

Static analysis result for SHA-256 68cbf350f0fb7137…

MALICIOUS

PDF

44.1 KB Created: 2020-09-04 16:39:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 58a048c09f308cb82871a21661107fcf SHA-1: 71c48dd065b9da2d540798ce14d9ac2f9c72ceb4 SHA-256: 68cbf350f0fb71372fd374545a8a6ba63f95fb0c8f05a5ea4912ed28f11c5050
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a critical heuristic firing for linking to known malicious redirector infrastructure, specifically 'ttraff.link'. It also exhibits a PDF link farm behavior, embedding numerous links to Shopify-hosted PDFs. The document body contains a URL that appears to be part of the SEO link farm, and the ML classifier strongly indicates maliciousness. The primary goal appears to be redirecting users to malicious sites or potentially for SEO manipulation.

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/wix?keyword=baby+love+photos++hd
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0434/4535/4658/files/44220995824.pdf
    • https://cdn.shopify.com/s/files/1/0437/6982/3390/files/anita_moorjani_dying_to_be_me_free.pdf
    • https://cdn.shopify.com/s/files/1/0427/7246/3772/files/aari_embroidery_stitches_tutorial.pdf
    • https://cdn.shopify.com/s/files/1/0433/8194/8567/files/overwatch_wrecking_ball_guide_2019.pdf
    • https://cdn.shopify.com/s/files/1/0434/5744/6038/files/zombie_survival_guide.pdf
    • https://cdn.shopify.com/s/files/1/0428/6647/5174/files/dusozofigika.pdf
    • https://cdn.shopify.com/s/files/1/0432/6332/8424/files/39619046513.pdf
    • https://cdn.shopify.com/s/files/1/0429/5698/0377/files/a_historical_perspective_of_speech_recognition.pdf
    • https://cdn.shopify.com/s/files/1/0438/2218/6656/files/bobrick_b_2111.pdf
    • https://static.usrfiles.com/ugd/b8c837_3e96a6c8c9e04edd9ce6e73a0fb29306.pdf
    • https://static.usrfiles.com/ugd/7d21c0_cfdf31768f354959aa9afa6d8bc786ed.pdf
    • https://static.usrfiles.com/ugd/defdb4_9551d0800dca4a4887ea946841b2b961.pdf
    • https://static.usrfiles.com/ugd/c5d40f_0a04ee7aa0fa400baa38c1da39c2cca9.pdf
    • https://static.usrfiles.com/ugd/ec0c41_63388ff445e44865b496c16c9d349bf0.pdf
    • https://static.usrfiles.com/ugd/a44510_b90b185707c945f8929660814ef1f5df.pdf
    • https://static.usrfiles.com/ugd/b910ae_74328bc6aa784c628fdb3e52527c5082.pdf
    • https://static.usrfiles.com/ugd/5899d5_6869bbf77c18472aa1a5f37478118d09.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_off00006693.bin
453847ba41e45554c8e8e64923d34674a560c106899e4825944f7511825a8fee		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6693 5300 bytes
font_01_sfnt_off0000789b.bin
a3c5c7b6f12418ee664538acf5bdad27f5e7e7796cd83057d60973ce8c1729fe		 pdf-font-stream PDF embedded font (sfnt) at offset 0x789B 13168 bytes

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