Malicious PDF — malware analysis report

Static analysis result for SHA-256 8c95db37db58dc6c…

MALICIOUS

PDF

55.4 KB Created: 2020-08-17 01:15:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: 9b3ef6baee80337e4a7132d566b4f07a SHA-1: dce19f218febc03f91b7b36a22c8bd26255bc1fb SHA-256: 8c95db37db58dc6cef1d5c17ee3f83391b3b6ca1b08151f7603e0138f002ba64
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a large number of external links, many pointing to domains that host PDF files, suggesting a link farm or SEO abuse tactic. One critical heuristic identified a link to a known malicious redirector at 'https://ttraff.com/pify?keyword=research+in+progress+report'. The document body, though heavily obfuscated, contains this URL, indicating the document's primary purpose is to redirect users to malicious infrastructure. 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.com/pify?keyword=research+in+progress+report In PDF document text
    • http://desuvolu.carolinaspecialtyproducts.com/uploads/1/3/2/8/132815028/marilevezifar-gogego-wavuwiwiwe.pdfIn PDF document text
    • http://xozer.karinalunatk.com/uploads/1/3/0/7/130738591/kuzimozomizek_boxuzofitiva.pdfIn PDF document text
    • http://files.wholesale.fanhubnw.com/uploads/1/3/1/4/131437765/40283f907a40904.pdfIn PDF document text
    • http://jibuvides.mission-ready.org/uploads/1/3/2/6/132695531/5187901.pdfIn PDF document text
    • http://xazugofu.staceywilk.com/uploads/1/3/1/4/131409090/wexatuwulaji.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/1/0433/8899/3699/files/analysing_english_sentences.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9246/7109/files/tirewoxadafepuzofok.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/1116/0738/files/2709544868.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/2834/9085/files/zawulebineguvuxusesiz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/3957/2643/files/75009505788.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/6149/1365/files/les_patineurs_piano_sheet_music.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/5393/2966/files/kugusowokilazepigija.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/6244/2646/files/63633662477.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4977/0395/files/95791137824.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/3358/4028/files/zovogafesejixutodafasiniw.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/75815848510.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/5382/4677/files/40445003388.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6865/2697/files/html_for_strikethrough.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00009dea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9DEA 5168 bytes
SHA-256: b769dd77778c68884a913567dd8ed8be72c3ee12d7e806c8440c00d174519a28
font_01_sfnt_off0000af7a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAF7A 9624 bytes
SHA-256: a4f5aaf0fe15f3856b36b3e039a4bb505e477e9a8165d16c6ea544072d4f8287