Malicious PDF — malware analysis report

Static analysis result for SHA-256 4eefe5fd0088dda1…

MALICIOUS

PDF

37.6 KB Created: 2020-08-03 21:51:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d3d6137677c8ebaf7ebdf9effa89006a SHA-1: a1a1c5658f6169d4621f94ad6265317b995e49fa SHA-256: 4eefe5fd0088dda14b10f1376a8b2ae56cd0df4387d84650d0c359ee0df22d3f
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Phishing: Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a large number of embedded links, many pointing to PDF files hosted on Shopify. One critical heuristic identified a link to a known malicious redirector at 'ttraff.ru', which likely serves as a lure or part of an SEO poisoning scheme. The ML classifier strongly supports the malicious verdict. No scripts were extracted, and the document body is heavily obfuscated.

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=psychological+theories+of+religion+james+forsyth+pdf
    • http://files.steigerclass.com/uploads/1/3/1/4/131437064/2813097.pdf
    • http://files.animalclinicofchardon.preview.pethealthnetworkpro.com/uploads/1/3/1/8/131856039/7258385.pdf
    • http://files.carolynfordart.com/uploads/1/3/0/7/130740011/mevowowedek_duwuwaviveto.pdf
    • http://files.grizzlyridgeupcycle.com/uploads/1/3/1/1/131164310/rexube-kowez-xukaxeguti-momoben.pdf
    • http://files.alisaexplainsitall.com/uploads/1/3/1/0/131070579/zamejadibodor_doruwez_roguzano.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/33540287451.pdf
    • https://cdn.shopify.com/s/files/1/0432/7522/3200/files/gugavajejugetudinakiw.pdf
    • https://cdn.shopify.com/s/files/1/0438/5167/7856/files/sugeliseromafipaboriz.pdf
    • https://cdn.shopify.com/s/files/1/0427/9199/3500/files/93399513099.pdf
    • https://cdn.shopify.com/s/files/1/0432/2403/9592/files/jedebarinegezezewemupamez.pdf
    • https://cdn.shopify.com/s/files/1/0430/0275/7281/files/15606056397.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/sogogetuxupoxex.pdf
    • https://cdn.shopify.com/s/files/1/0437/1808/2711/files/fazuwesu.pdf
    • https://cdn.shopify.com/s/files/1/0435/8940/2779/files/lodefizikitotix.pdf
    • https://cdn.shopify.com/s/files/1/0434/2795/4853/files/banoxonezafawu.pdf
    • https://cdn.shopify.com/s/files/1/0427/9340/2524/files/six_weeks_to_sick_arms_download.pdf
    • https://cdn.shopify.com/s/files/1/0438/0714/6146/files/mosukat.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/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005228.bin
bf0b047e449842b33724a81c6e96e7ef94f818cf0527dd1d513ee41138774a9d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5228 5748 bytes
font_01_sfnt_off0000659f.bin
43b4dd98bb204568d859af59d814510551924f58941ec3e9fe27e21da480bf81		 pdf-font-stream PDF embedded font (sfnt) at offset 0x659F 10776 bytes

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