Malicious PDF — malware analysis report

Static analysis result for SHA-256 12cfb3e3f62757c7…

MALICIOUS

PDF

52.9 KB Created: 2020-08-07 15:49:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: a119a6df667f69868318410cc2b888b4 SHA-1: f7a5abd37a5d528cf957b9efb7bbcede65cfd76b SHA-256: 12cfb3e3f62757c77ba287fe06f02f6e7d1488f2ccf72f963a74b2c179b43b63
194 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to a redirector infrastructure known for hosting malicious content. The ML classifier strongly indicates maliciousness, and the presence of a redirector URL suggests a phishing or malware distribution attempt. Although no scripts were explicitly extracted, the PDF structure and embedded links are indicative of a malicious lure.

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=cambios+sociales+del+envejecimiento+pdf In PDF document text
    • http://files.kwongwingkwan.com/uploads/1/3/0/9/130969500/3739562.pdfIn PDF document text
    • http://kumitazek.chtechlab.com/uploads/1/3/0/7/130775934/sanekukoz-vuwopopejen-pefum-beveler.pdfIn PDF document text
    • http://files.msckylesportsforspecialneeds.com/uploads/1/3/0/7/130776592/latasimetubatexasomi.pdfIn PDF document text
    • http://files.lisa--hall.co.uk/uploads/1/3/2/7/132710700/9a26a0b198ae.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/1/0429/8794/6133/files/kugenefasirag.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1079/3370/files/64553507936.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9502/4033/files/41852342689.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8012/2532/files/6175142965.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5117/1478/files/describe_sociology_as_a_science.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/3059/4204/files/donakotesezovijegimedole.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1393/0142/files/31432751537.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6527/8625/files/neragatamifeginizejowika.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/8475/9711/files/faxalesekedasawa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6999/7207/files/86223556529.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/1959/7981/files/type_of_network_topology.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9925/0081/files/vomugedon.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/6092/7393/files/equilibrio_acido_base_veterinaria.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0778/6654/files/wujejifuvesenubu.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00008ef3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8EF3 5388 bytes
SHA-256: 383cab1e8434cb2be931e2ced962821f08a9c4369bf7051b1e1ee70c2dc9c718
font_01_sfnt_off0000a137.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA137 11456 bytes
SHA-256: d7aa604e25063dbf27428fa5b9a409f74ceeecfbd44a3552c3edecc790ef4f6d

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