Malicious PDF — malware analysis report

Static analysis result for SHA-256 a33af88121a87078…

MALICIOUS

PDF

40.1 KB Created: 2020-08-16 20:41:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: e1092a49125876d1d29b032ef73ec583 SHA-1: 7835d574df881af0e4fe80697ca8b615abf27fae SHA-256: a33af88121a8707803f2d066fae4157b42d66211d9d705c501869ac3f5d6e520
182 Risk Score

Malware Insights

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

The PDF contains a malicious redirector link disguised as a download for 'Whatsapp pc windows 7'. It also hosts a large number of external PDF links, likely for SEO manipulation or to obscure the malicious redirector. The document body contains obfuscated text and the malicious URL, confirming the intent to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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.
  • QR-code redirect lure medium SE_QR_LURE
    Document instructs the user to scan a QR code with a phone — consistent with QR phishing, but also common in legitimate documents
  • SEO-redirector lure link (multi-word utm_term) low PDF_SEO_UTM_REDIRECTOR_LINK
    PDF contains a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the search-keyword gateway used by the 'free document download' phishing family. Surfaced as an IOC; on its own this is a low-confidence signal.
  • 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=whatsapp++pc+windows+7 In PDF document text
    • http://mabid.pearpack.com/uploads/1/3/1/6/131636725/kuzoso_mefobupet_wobonaparul.pdfIn PDF document text
    • http://files.trevormarsh.com/uploads/1/3/0/7/130738984/8307013.pdfIn PDF document text
    • http://files.atleet.fitness/uploads/1/3/1/8/131856852/4501845.pdfIn PDF document text
    • http://wiradiz.miss-pj.com/uploads/1/3/2/8/132814930/mavolafukefu-dopevejozamij.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/1/0433/7028/3166/files/nonparametric_statistical_inference_fifth_edition.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3282/9342/files/dujewatusekugadojadef.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6498/3703/files/26064797600.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/9928/1821/files/bd_chaurasia_handbook_of_general_anatomy_7th_edition.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8844/5589/files/zinidajugetupokoxanilubel.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7870/4549/files/senenezexukejakapope.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/8460/1752/files/39200220596.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4168/5665/files/polaris_280_parts_diagram.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8145/8069/files/73561134410.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5764/2648/files/biostatistics_examples_and_solutions.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7541/9812/files/45798390612.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/8113/7316/files/ravigikisitufakojaripidag.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 3

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_off00005fab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5FAB 5220 bytes
SHA-256: 02936ead8de1726294f427d8c6c7dad124296ac4ba39971d1787de77d0d7ea44
font_01_sfnt_off00007182.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7182 10020 bytes
SHA-256: afc236df6ccd5fe3114ad8a88823e356d36f5739bffc33a37f52cfb68f4654ce

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