Malicious PDF — malware analysis report

Static analysis result for SHA-256 cb84530f90ba8395…

MALICIOUS

PDF

44.0 KB Created: 2020-08-07 03:52:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 42d393b7da14b84d29dc796f6715f459 SHA-1: 092e2e1c4e5ce7e3c3e888a0b59ecf882b552048 SHA-256: cb84530f90ba8395df98198fc1f42dc00c5330a73caa0b0154c76a0d3eab0df9
194 Risk Score

Malware Insights

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

The PDF file contains a link farm designed to appear as legitimate PDF documents, but one of the primary links redirects to a known malicious redirector. This indicates a social engineering attempt to trick users into visiting malicious sites. No scripts were extracted, and the document body was heavily obfuscated, making it difficult to determine the exact payload.

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=categorias+del+materialismo+dialectico+rosental+y+straks.+pdf In PDF document text
    • http://dozetoro.vanderlegal.com/uploads/1/3/1/4/131438641/ladex-wilojudinotij-vunibaxazizu.pdfIn PDF document text
    • http://files.inmotionphotographybykarlie.com/uploads/1/3/1/4/131406337/genupugilaz_bozozol_meputexopa.pdfIn PDF document text
    • http://files.frederick-biebesheimer3.com/uploads/1/3/2/6/132695586/vojitolusoxup_mokevape_topopelosutuzet.pdfIn PDF document text
    • http://jizafu.charlotteshelix.net/uploads/1/3/0/8/130874359/fifuku.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/1/0433/2758/6472/files/ph_of_buffer_solution_calculation.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6406/5174/files/physics_solution_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4283/1522/files/molinoladaxalowizabebut.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0825/3344/files/wumowipobe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8578/3447/files/tumazumemib.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/3407/5558/files/87891394892.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9600/7065/files/kovajuji.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/8477/4552/files/debatudaxogudalivuv.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1340/5850/files/33127626846.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/0831/9907/files/coleman_powermate_6250_parts.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5863/4658/files/nemiparuwuginotapu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0447/4611/3173/files/que_es_el_bioplastico.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/3033/2060/files/optimization_in_operations_research_rardin.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_off00005f86.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5F86 5580 bytes
SHA-256: 42f6814254d7fa331a72049606f8a1264624e2fb51c298f5479f8617c42c92a2
font_01_sfnt_off0000727b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x727B 15288 bytes
SHA-256: 7a3395f88fca32edae9a5f8c9ebe52b9c46471e19174aa24a219aa282fe39bb6

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