Malicious PDF — malware analysis report

Static analysis result for SHA-256 8890c4f1a5732c3f…

MALICIOUS

PDF

89.3 KB Created: 2020-08-18 19:26:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 859e2f945417ac11f311d0d89f576df0 SHA-1: cc42be41478d897776f1961d23986ee36e33ccb3 SHA-256: 8890c4f1a5732c3f9f40cf54923189487552fd370c14f6c50be70c086dfce769
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous links to external resources, many of which are part of an SEO link farm designed to lure users. One critical heuristic identified a link to a known malicious redirector, https://ttraff.ru/pify?keyword=algebraic+and+geometric+multiplicity+pdf, which is likely intended to deliver a malicious payload or phish for credentials. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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.ru/pify?keyword=algebraic+and+geometric+multiplicity+pdf In PDF document text
    • http://savuded.tcjewellery.co.uk/uploads/1/3/1/3/131398020/6c1aeaf9f7a6c0c.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/1/0439/8222/5566/files/pomazajaseteviwi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4750/1474/files/pabupalanorokoderadav.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/2971/7407/files/bigigi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3142/8248/files/lumbar_disc_herniation_treatment_exercises.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/3282/8314/files/book_of_lies.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0684/4315/files/programa_arquitectonico_de_un_mercado.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8716/7645/files/libejopudevusa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4794/3330/files/rental_agreement_template_free.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8852/7013/files/standard_kitchen_cabinet_sizes_in_mm.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 7

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

Full JSON: related samples API

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e75a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE75A 2912 bytes
SHA-256: d0763fbd271711262b0a26362cc9c99fb155632731fabfacbbfc72efdb3f7c44
font_01_sfnt_off0000f1bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1BD 5528 bytes
SHA-256: 5a00973595673278e53f808137cf0e528383968ddc4f1c1063e9d761034728bf
font_02_sfnt_off00010474.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10474 18360 bytes
SHA-256: 44abe543bfa6f1a553c5a1fcf4b9060ae3dda662fe53ba7be25f73c95a2dec2b
font_03_sfnt_off00013e53.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13E53 17320 bytes
SHA-256: 05473fdf16b367e038a5f5cabc92e306f1c6f91e9588d71d563e550f24345fb5

Open this report in the interactive analyzer, or submit your own file for analysis.