Malicious PDF — malware analysis report

Static analysis result for SHA-256 5e92e0472481a3ee…

MALICIOUS

PDF

43.6 KB Created: 2020-08-13 03:50:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8e8a00e7f460b5c2b9f75d418953958b SHA-1: a1d8ad34755e651b7182584c5e8d3cb3086ece73 SHA-256: 5e92e0472481a3eea1ef600879f5c46e9ad7ec96236265134e2cb74fc15ccfd1
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links, including one pointing to known malicious redirector infrastructure. The primary heuristic indicates the PDF is a link farm designed to redirect users to potentially harmful sites. While the document body contains garbled text, the presence of the malicious URL and the link farm heuristic strongly suggest a phishing or redirection attempt.

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=pet+attitude+scale+pdf
    • http://xeval.catchamomentphotos.com/uploads/1/3/1/6/131636612/xipekixekiwatibek.pdf
    • http://files.fairytalejourneysbybrett.com/uploads/1/3/1/6/131607110/gipubitanejide.pdf
    • http://files.janinegoldsworthy.com/uploads/1/3/1/3/131383444/resanemare.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0438/6449/0149/files/tinkle_magazine_free.pdf
    • https://cdn.shopify.com/s/files/1/0431/6807/1836/files/4319934511.pdf
    • https://cdn.shopify.com/s/files/1/0434/2818/4231/files/9277999025.pdf
    • https://cdn.shopify.com/s/files/1/0439/1701/7256/files/70921014840.pdf
    • https://cdn.shopify.com/s/files/1/0428/4396/3548/files/muwisadobarulide.pdf
    • https://cdn.shopify.com/s/files/1/0434/5721/6678/files/judupikizupejum.pdf
    • https://cdn.shopify.com/s/files/1/0436/4953/2057/files/the_brief_bedford_reader_12th_edition.pdf
    • https://cdn.shopify.com/s/files/1/0434/8457/7956/files/bizazepab.pdf
    • https://cdn.shopify.com/s/files/1/0438/0003/5485/files/11023148435.pdf
    • https://cdn.shopify.com/s/files/1/0428/7037/4566/files/telopodinawakobisiwaberi.pdf
    • https://cdn.shopify.com/s/files/1/0433/5560/3094/files/49783448977.pdf
    • https://cdn.shopify.com/s/files/1/0428/7053/8406/files/jilopaxegupaseladajadaga.pdf
    • https://cdn.shopify.com/s/files/1/0434/7848/3096/files/applied_behavior_analysis_for_teachers_ninth_edition.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_off00006925.bin
a0952066d5b30ae798b07a7ccc2364e0dcdb46a4a729589f38368a7f0cf89961		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6925 5052 bytes
font_01_sfnt_off00007a67.bin
17e970861eee6f5d0468c3e87c097b2c94025bbe68f809508410d2feecc8f1fc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7A67 12244 bytes

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