Malicious PDF — malware analysis report

Static analysis result for SHA-256 9ca977332c28238f…

MALICIOUS

PDF

43.6 KB Created: 2020-08-19 05:29:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 3b16c9eca0dfdc917de4d09597062eed SHA-1: 298671ae4a155de25d581b1108f847d64e79cd5b SHA-256: 9ca977332c28238fc7cd913afe6ae8a0cbbe3a0c2c794dbf6fb8564ed00611b1
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF file contains a large number of embedded links, many of which point to a redirector service known to host malicious content. The document body, while appearing academic, contains a URL that leads to this redirector. The presence of a link farm and a malicious redirector suggests an attempt to drive traffic to malicious sites, likely for phishing or malware 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=crystallography+of+martensite+transformations+in+steels In PDF document text
    • http://files.southforkvoice.com/uploads/1/3/2/6/132682868/zagazazaligewi-kilinorolisot.pdfIn PDF document text
    • http://files.hsccmilwaukee.com/uploads/1/3/0/8/130813715/kapafoxunesozuf.pdfIn PDF document text
    • http://files.kathrynrobertson.co.nz/uploads/1/3/1/4/131453651/1049ac4a99a9.pdfIn PDF document text
    • http://files.woodlandsparkbaltimore.com/uploads/1/3/0/7/130740517/1370510.pdfIn PDF document text
    • http://kavup.wkelearning.com/uploads/1/3/1/6/131636725/a6d1bfa9.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5760/1943/files/43080258988.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/2379/4337/files/8502839077.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/2689/8344/files/gunivaj.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8218/6905/files/god_of_war_movie_in_tamilrockers.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/2134/3647/files/nekixugo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8535/7463/files/47692737462.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0448/0499/7271/files/14450614197.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8702/8641/files/daleb.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4031/7335/files/fewoxorimefiwiverefizu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3910/4917/files/69040393223.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005f0a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5F0A 5228 bytes
SHA-256: 64c2064e9d9275129895460d7d4ef7356afa48d507d979385da30d2846a0fbef
font_01_sfnt_off000070b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x70B2 9992 bytes
SHA-256: 210817e64b3128af0d2f3f437540ddd24d5f152e4c0d90e17294cca53512d40d
font_02_sfnt_off000092e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x92E5 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

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