Malicious PDF — malware analysis report

Static analysis result for SHA-256 87493c2176d4d340…

MALICIOUS

PDF

35.4 KB Created: 2020-08-07 05:13:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: ae962f12e0d4e079b0fd6af0ed8a819f SHA-1: e77be5f96ee1306a5c8d137222ce72aa0a580eeb SHA-256: 87493c2176d4d3408ffc9e23dc9b060c72a8b022e29ff4b6ff5d02df39f6ffb5
214 Risk Score

Malware Insights

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

The PDF contains a malformed exploit stream and links to known malicious redirector infrastructure, specifically `https://ttraff.com/pify?keyword=almanach+2020+pdf`. It also hosts a large number of external PDF links, many of which are on Shopify domains, suggesting a link farm for SEO-based phishing. The ML classifier strongly indicated maliciousness.

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.
  • Malformed active-content stream length medium PDF_MALFORMED_EXPLOIT_STREAM_LENGTH
    A PDF stream that carries active/exploit-looking content has a declared /Length that does not match the recovered stream body. Malformed stream boundaries and length mismatches are common parser-evasion/supporting evidence around Reader exploit streams.
  • 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.com/pify?keyword=almanach+2020+pdf In PDF document text
    • http://files.smithsolarlab.com/uploads/1/3/1/3/131381605/71b6ebe93d39.pdfIn PDF document text
    • http://mosupod.newtonhillckd.co.uk/uploads/1/3/1/6/131636725/gijusitixo.pdfIn PDF document text
    • http://files.chenowethbairddesign.com/uploads/1/3/1/8/131871894/kawal_fudomur.pdfIn PDF document text
    • http://files.rockymountainjackpotshowseries.com/uploads/1/3/1/0/131070112/da88b34310b9.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/1/0428/8076/2023/files/95432261788.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8659/3694/files/xusabape.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/3945/7431/files/operatoria_dental_barrancos_4ta_edicion.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/2129/3974/files/18654255388.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/7788/6367/files/tebemokerumapi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1320/9246/files/boposi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3049/4878/files/67573518990.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/8043/4342/files/23260162716.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/0147/1388/files/9502687915.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9802/9733/files/63163838944.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7811/4727/files/86119307176.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_off00004af0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4AF0 5384 bytes
SHA-256: 5ae3774d3e0192bd92275fc30f01d73947f4b7f610510ad0368ab79747bb4b4e
font_01_sfnt_off00005d1e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5D1E 10588 bytes
SHA-256: a3a75c7a83bc827f84910ffec170aae5e229473e5f50e18e7d6a92fdf0b2f04c

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