Malicious PDF — malware analysis report

Static analysis result for SHA-256 b7ed95529cc128ea…

MALICIOUS

PDF

44.4 KB Created: 2020-08-04 06:16:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 31e0edcbbeba7b84c41b09b3b86c5bc6 SHA-1: 72252bafe160ac812c1ae005663b22e0a219b793 SHA-256: b7ed95529cc128ea9db16279989172fe00987834c60f9c99e6621a6641fe6f87
194 Risk Score

Malware Insights

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

The PDF contains a significant number of external links, many of which point to a redirector service known for malicious activity. The primary malicious URL identified is https://ttraff.cc/pify?keyword=marcador+tumoral+antigeno+carcinoembrionario+pdf, which is designed to lead users to further malicious content. The document body, though heavily obfuscated, contains references to this URL and other PDF files hosted on Shopify, suggesting a link farm strategy to distribute malicious payloads.

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=marcador+tumoral+antigeno+carcinoembrionario+pdf In PDF document text
    • http://files.bhlexvolunteers.com/uploads/1/3/2/6/132683246/zulijadamekapav.pdfIn PDF document text
    • http://files.mhecblacon.com/uploads/1/3/1/4/131437351/vasak.pdfIn PDF document text
    • http://files.awordtothewiseandcommonsense.com/uploads/1/3/2/7/132740958/jubizuvime.pdfIn PDF document text
    • http://files.gordon-setter.pl/uploads/1/3/0/7/130776363/mamixukori-wulun.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/1/0433/8457/0019/files/17530198407.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/8161/9870/files/garapajeb.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/8575/7606/files/29144487135.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3262/4797/files/area_of_shapes_test.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1564/3031/files/90804501936.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/8052/4710/files/94289378583.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/dadimutixiwukigojubiw.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/8579/8301/files/22138008060.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/8502/7745/files/sofokles_antigona_kniha.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_off000063b6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x63B6 5444 bytes
SHA-256: bc9a872935451553d4999d717677bc86300685400227e89546b6fb0c55a137eb
font_01_sfnt_off0000762f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x762F 15092 bytes
SHA-256: a845ff0f16120ab90190de64ac80a123ee4bd958099ff5e0df7337cb610eec19

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