Malicious PDF — malware analysis report

Static analysis result for SHA-256 c77d1e1683ebe0bf…

MALICIOUS

PDF

37.5 KB Created: 2020-08-08 11:44:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 279da7c4080a75678d98e0281b6c7116 SHA-1: 2c0d6f24c7aa186be14e3c2a5763edafec0880de SHA-256: c77d1e1683ebe0bffc575d14196c25a6389580101ac4c5a4ad6eded8a45d53f3
194 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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=attributional+style+questionnaire+asq+pdf In PDF document text
    • http://files.friendswithflightbenefits.com/uploads/1/3/1/0/131070485/vovaraluxosuxow.pdfIn PDF document text
    • http://wasasuge.mastermindandbrain.com/uploads/1/3/2/6/132696194/4436959.pdfIn PDF document text
    • http://files.backcourtballers.com/uploads/1/3/1/8/131860787/3168702.pdfIn PDF document text
    • http://files.rollinghillsfarmandequinellc.com/uploads/1/3/1/8/131856743/4769957.pdfIn PDF document text
    • http://files.marymartinembroidery.com/uploads/1/3/2/3/132302759/xomagusegixumom_tosuni_kitojijojomewur_suxumodumawek.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/2316/3801/files/vuveloxinikigogozepevumop.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/2417/8600/files/biochemistry_book_stryer.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8706/0375/files/ratagowuvolowezuw.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3199/4280/files/tijupufigonalel.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/4120/1064/files/19992763719.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/0884/2152/files/sadojolovetapi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5011/4978/files/bawozafawanabijivekeveraj.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/9827/4978/files/79655650758.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/5654/6467/files/33634926871.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5669/2390/files/antrenmanlarla_geometri_tyt.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_off00005335.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5335 5392 bytes
SHA-256: cabcbe791581250eb88a48a101daf30f1cca6b34f15651246d6328bc943c00e3
font_01_sfnt_off00006599.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6599 10524 bytes
SHA-256: ae7594da0826c0cf4bd88f7b3ab61a5ae54dca77f3b65b768e377f470aa932cf

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