Malicious PDF — malware analysis report

Static analysis result for SHA-256 2ff4a337681039cb…

MALICIOUS

PDF

34.4 KB Created: 2020-10-05 11:48:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: fc0e8c46b4400e0829d68cc08b8c29d5 SHA-1: eb2aa5ff90f61c39cba318bf3e19c67ee4913eb7 SHA-256: 2ff4a337681039cbaaacc1612277e548e86b1d10b6873cf21e290e5e7ff65ed7
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a large number of embedded links, many of which point to external PDF files, forming a link farm. One of the primary links directs to a known malicious redirector. This suggests the document is part of a SEO poisoning or link farm attack designed to drive traffic to malicious sites.

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://cctraff.ru/strik?keyword=rainwater+harvesting+in+kannada+pdf In PDF document text
    • https://site-1040432.mozfiles.com/files/1040432/gewegixisiwisonoxulimuze.pdfIn PDF document text
    • http://mijiz.flyintofirstgrade.com/uploads/1/3/1/6/131636601/ca61cd6a8c8.pdfIn PDF document text
    • http://files.troop76losaltos.com/uploads/1/3/2/6/132681901/6291608.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/4396372d-b926-4425-a5f3-e956fb14562e/94771624342.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2a13b1ba-214b-498a-a1e6-06ecbab01fc3/xupipaxaxozes.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fc67a21f-b68d-4311-a3a6-8eac986eecf8/pezagamamadelurono.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/491fe00f-5f19-4991-87b2-6170e762528c/tumuzofuwibafaxajosubux.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e441b094-84e3-4408-969e-87c5744752c2/85030994109.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5768/4385/files/mole_calculations_practice_worksheet.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/8584/6945/files/jegipifevarusumeder.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/9097/5647/files/bubalesiju.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/1760/7067/files/el_pollo_loco_caesar_bowl_calories.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/5672/4128/files/plastic_lace_crafts_for_beginners.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004a22.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4A22 5492 bytes
SHA-256: 86bd38ef7d0e45419ff938e7d7bc6a480908c188c78448450e09220f0d899530
font_01_sfnt_off00005cec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5CEC 9396 bytes
SHA-256: 7646a31810172ce90c9eb05851704c38e918b3dd83a5f0cbf161d40b4823813e

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