Malicious PDF — malware analysis report

Static analysis result for SHA-256 c157041bf54a9f96…

MALICIOUS

PDF

67.5 KB Created: 2020-08-24 06:46:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 77654915c4bc6056f41519b10a85f6b8 SHA-1: 8b4532f61822bc4ae49deae7ea7a3cf74decdfa5 SHA-256: c157041bf54a9f96c40e6c996f5f5bcc2c0701fa007c44f87838d712a356f68e
202 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains embedded links that point to a known malicious redirector, ttraff.ru. The document body, though heavily obfuscated, contains text related to financial classification and also includes the malicious URL and a benign-looking Shopify URL, suggesting a lure to trick users into clicking the malicious link. The presence of multiple external PDF links further indicates a link farm strategy.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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=allowance+for+doubtful+accounts+balance+sheet+classification In PDF document text
    • http://kudax.decoysales.com/uploads/1/3/0/8/130813528/ea8fb8bb0.pdfIn PDF document text
    • http://files.jacquilewisarttherapy.com.au/uploads/1/3/0/7/130740571/5cafd.pdfIn PDF document text
    • http://files.asapalley.com/uploads/1/3/0/7/130740533/dagisifugalazuge.pdfIn PDF document text
    • http://files.garnerconsulting.com/uploads/1/3/1/3/131380619/xerokalawixokajokive.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/1/0433/3918/6344/files/decluttering_checklist.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0268/2789/files/92203049933.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5287/5432/files/wipabome.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/7074/8827/files/speaking_activities_elementary.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/4539/4331/files/binomische_formeln_bungen_klasse_8.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/8725/0087/files/bodalixunezelifexemejuwuk.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7111/1330/files/lagofenavixadoje.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/4650/9461/files/blazblue_clone_phantasma.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/5764/9566/files/35993859800.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/5985/3977/files/wpf_celleditingtemplate_itemssource.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000be96.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBE96 2828 bytes
SHA-256: 4aba2bb845853324476be69e5ed1bf4ff35002942389efac2b843cac1129f0e9
font_01_sfnt_off0000c891.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC891 5332 bytes
SHA-256: a2ac28cfb77d9def9f80af33fd44dae44d84652cf709553263a343bbc73a1082
font_02_sfnt_off0000dab3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDAB3 11092 bytes
SHA-256: 35a306a205492c259d8aaa0311cda278f226db57afc885b99a5c286989ccf9b8

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