Malicious PDF — malware analysis report

Static analysis result for SHA-256 09a8082f51f87edf…

MALICIOUS

PDF

46.5 KB Created: 2020-08-06 16:24:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d1f165b828962c07975c1f85b8b83e07 SHA-1: d1b751d436403e3f03b410bdca7142cb475b8cf7 SHA-256: 09a8082f51f87edf5ddcb8906aea9d30d95ea29975beb33d92be4db902d84d12
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links, many pointing to a link farm hosted on Shopify, designed to appear as legitimate PDF downloads. One critical heuristic indicates a link to known malicious redirector infrastructure, specifically 'ttraff.cc', which is used to obscure the final destination. The ML classifier strongly flagged this PDF as malicious, supporting the conclusion that it is part of a phishing or scam campaign.

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.cc/pify?keyword=brief+answers+to+the+big+questions+pdf
    • http://files.syndicategg.org/uploads/1/3/2/6/132681294/zozitinafubif_zetuwopisu_jofepagurowom.pdf
    • http://todemov.prodajproductions.com/uploads/1/3/0/8/130874284/7663845.pdf
    • http://files.shadesofdenimaus.com/uploads/1/3/1/6/131636655/7a04b90ef2f.pdf
    • http://files.lionsdiabetesawareness.org/uploads/1/3/0/7/130739398/gibozomupeti_dewudon.pdf
    • http://files.womencliniccentre.com/uploads/1/3/0/8/130813696/bijovigisezuramazo.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0432/2770/9597/files/59866314401.pdf
    • https://cdn.shopify.com/s/files/1/0427/9851/4343/files/bunupu.pdf
    • https://cdn.shopify.com/s/files/1/0433/3692/5342/files/luvalavi.pdf
    • https://cdn.shopify.com/s/files/1/0429/3502/5831/files/87713416992.pdf
    • https://cdn.shopify.com/s/files/1/0436/9186/8310/files/54707836717.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/wowivitotorinu.pdf
    • https://cdn.shopify.com/s/files/1/0437/5809/2439/files/27542335251.pdf
    • https://cdn.shopify.com/s/files/1/0430/9378/6791/files/58683464594.pdf
    • https://cdn.shopify.com/s/files/1/0436/9596/4328/files/52882815047.pdf
    • https://cdn.shopify.com/s/files/1/0431/6699/0498/files/15741084204.pdf
    • https://cdn.shopify.com/s/files/1/0430/3932/6365/files/tamegoj.pdf
    • https://cdn.shopify.com/s/files/1/0436/3337/7440/files/13085591465.pdf
    • https://cdn.shopify.com/s/files/1/0436/9619/3686/files/davadeliwu.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_off000076cb.bin
cdee5f41c69770cc89894917dbb13d59d71df4e68d082e529cb3231d8133388f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x76CB 5676 bytes
font_01_sfnt_off00008a16.bin
5480ab1b16c4b2506045b749d206e2bb136f9b9187f466b04fa7cb2f58f829d6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8A16 10172 bytes

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