Malicious PDF — malware analysis report

Static analysis result for SHA-256 85b2edaa34aafe85…

MALICIOUS

PDF

35.4 KB Created: 2020-08-23 05:21:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 2ff16e664c7391fba18957505a10deeb SHA-1: 840b2ca573cb846cce393d3f8e45df96714e52af SHA-256: 85b2edaa34aafe856423706b67f090dd2b6121ed1795fe829cb60e125bf5e22e
194 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with a critical heuristic firing indicating a malicious redirector. The document body, though partially corrupted, contains text referencing 'Marella clothing size guide' and a URL that redirects to malicious infrastructure, suggesting a phishing or scam lure. The ML classifier strongly supports the malicious verdict.

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=marella+clothing+size+guide In PDF document text
    • http://fusudomuf.clarioncountyato.org/uploads/1/3/2/6/132681670/xowululorero.pdfIn PDF document text
    • http://files.friendsofhuggins.org/uploads/1/3/1/0/131070581/deperatonoru.pdfIn PDF document text
    • http://muravotu.thestringninja.com/uploads/1/3/2/6/132681337/313617.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/1/0437/6759/5165/files/20033285758.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5018/0514/files/89974530041.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0454/4213/8262/files/android_studio_generate_apk_name.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7225/7181/files/26792790141.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3431/1832/files/lavofopisonajinozikiguwed.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1892/7775/files/what_are_personal_values.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/0091/2278/files/megox.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4555/1271/files/80864904572.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 6

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_off000049ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x49BA 5256 bytes
SHA-256: 73cf8b7d1d5e67edd01ec24f4eee1f8f3b13bfeb65587e6ad3f7f239e1434617
font_01_sfnt_off00005b9a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5B9A 11684 bytes
SHA-256: 2508844bb4eeb6d93e8271607a623b047587e201b33f84758b1d2c9a75c92a9b

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