Malicious PDF — malware analysis report

Static analysis result for SHA-256 44701592ca22a2b9…

MALICIOUS

PDF

41.6 KB Created: 2020-08-08 21:08:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 2b5da62eff000358cc45eea809f683e6 SHA-1: dfb3689cbfce5e29449a4dcf76096a8c1a6c3b26 SHA-256: 44701592ca22a2b9fc2c75e9799f396a1832761762a92833c4eba72b00630d83
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a large number of embedded links, with a critical heuristic firing indicating a link farm pointing to a redirector service. The primary malicious URL identified is https://ttraff.ru/pify?keyword=anatomia+musculos+del+cuello+pdf, which likely serves to obscure the ultimate destination of the attack. The document body itself contains garbled text and references to wkhtmltopdf, suggesting it is not intended for legitimate user consumption but rather as a vehicle for link distribution.

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.ru/pify?keyword=anatomia+musculos+del+cuello+pdf In PDF document text
    • http://files.mathbag.com/uploads/1/3/1/6/131607131/3b3309d91e61.pdfIn PDF document text
    • http://files.upotteryvillagehall.org.uk/uploads/1/3/2/7/132710726/da46dca25cb.pdfIn PDF document text
    • http://files.dogriverhorseclub.com/uploads/1/3/0/7/130739369/3379656.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/1/0436/1145/5645/files/90495888918.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/8208/7588/files/88884910675.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/1571/4469/files/84200503166.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/8920/6174/files/15804913156.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5575/9011/files/31650641542.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/3834/9211/files/naruto_the_last_movie_downloads.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4667/4336/files/materiales_ceramicos_refractarios.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/1431/5422/files/taz_visual_overhaul.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/3582/0185/files/69956226965.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7513/2824/files/sivisukitanusixabepu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9948/0473/files/pumitetodesejizuto.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000634e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x634E 5196 bytes
SHA-256: d8b1e5bcec26c6a5bccc0a7a1a2486c6acfc126f0d00bebb6125cc4ec3a065d2
font_01_sfnt_off000074f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x74F1 10776 bytes
SHA-256: 643bfff4e35aac8b6b5dbf7e617311edc5d759a017a7543846f534420c51bddf

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