Malicious PDF — malware analysis report

Static analysis result for SHA-256 9e8c7b1669217e11…

MALICIOUS

PDF

42.7 KB Created: 2020-08-13 21:33:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 27a59d77c7281fe4afaae98eb3f578a0 SHA-1: ea59fbb392d41f55463da1289433e3f5cca8a321 SHA-256: 9e8c7b1669217e1166967d214cf4f1cac7f5b801a341cf4cde23235029a8d7b6
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, many of which point to potentially malicious redirectors or unknown domains. The heuristic PDF_MALICIOUS_REDIRECTOR_LINK and PDF_SEO_LINK_FARM indicate a deliberate attempt to host a link farm. The ML classifier also strongly flagged this PDF as malicious. No scripts were extracted, but the primary attack vector appears to be the extensive use of malicious links to redirect users to harmful content.

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=apa+reference+list+example+pdf In PDF document text
    • http://files.eternitygravestones.com/uploads/1/3/1/4/131483281/35404e.pdfIn PDF document text
    • http://vunirob.litestprep.com/uploads/1/3/0/8/130813528/dibiduruxexixazi.pdfIn PDF document text
    • http://xalin.robkajiwara.com/uploads/1/3/1/3/131383483/jolazijinibadinedegu.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/1/0435/4126/6587/files/java_swing_tutorial_javatpoint.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9806/2501/files/33753074398.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0706/5760/files/78610766231.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/8300/5093/files/35035982030.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9236/1887/files/a_christmas_carol_key_quotes_and_analysis.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/5719/8757/files/migulikenivelejavinovop.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/1880/5657/files/all_international_airport_codes.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/7988/3170/files/xudis.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2986/4343/files/sudagukutojabizixasumusa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/2230/3911/files/xalinemokaka.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 1

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_off000066bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x66BB 5360 bytes
SHA-256: 32ced507cad7bf0d5dd2a9ebe2fbeacd38940c956368877ddcdeeab071953702
font_01_sfnt_off000078db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x78DB 11008 bytes
SHA-256: d0109a985bcfa5f31e3e3324ab8adce255103df25adfffcc68be9a500213d454

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