Malicious PDF — malware analysis report

Static analysis result for SHA-256 7dc97b842c359b87…

MALICIOUS

PDF

43.2 KB Created: 2020-08-07 13:18:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 6e860be19c039f6da9a0bdf5be3b6c15 SHA-1: 157f27b0815a4f6f721f2521f5adbc09b8bf0556 SHA-256: 7dc97b842c359b87aa800281586ddaa65fa84ae0c2d2b40ac98e996fd262642c
194 Risk Score

Malware Insights

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

The PDF contains numerous links to a redirector service, which in turn points to a link farm of other PDFs. This suggests a tactic to distribute malicious content or phish for information under the guise of academic papers. The ML classifier strongly indicated maliciousness, and the presence of a redirector URL is a high-confidence indicator of malicious intent.

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=brownian+motion+and+stochastic+calculus+pdf In PDF document text
    • http://files.robwms.com/uploads/1/3/1/3/131380008/rabito-zageguwiw.pdfIn PDF document text
    • http://files.tackandhorseoman.com/uploads/1/3/1/4/131407737/00e48a.pdfIn PDF document text
    • http://files.psusdarts.org/uploads/1/3/2/6/132696512/gopimavex.pdfIn PDF document text
    • http://bagim.salmanhashmi.com/uploads/1/3/0/8/130814328/xujegufelit_gisawamad_xijedamazo_dofofi.pdfIn PDF document text
    • http://files.la-arts-district.com/uploads/1/3/0/9/130969471/936724.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/1/0438/7949/7896/files/87461928403.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6464/7077/files/nibaverizesurosewised.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/1471/7597/files/bayesian_inference_and_decision_theory.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/0688/6051/files/88478406067.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/9851/4343/files/beled.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2550/6208/files/24056124251.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7760/7324/files/8222050036.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/3765/5193/files/wheelhouse_5550_generator_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/0863/7602/files/best_psp_themes.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/4760/0807/files/73811168632.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7074/9856/files/circus_circus_musgrave_menu.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_off00005d84.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5D84 5300 bytes
SHA-256: 5564d9290d6d325b9dffe38c55b74afe978f6322763b6989e5360a88af6d655a
font_01_sfnt_off00006f68.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6F68 9948 bytes
SHA-256: 1f43aed573f9727801f4205d49a8cc2d03959440a53e287e85434c89901ea50b
font_02_sfnt_off00009184.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9184 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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