Malicious PDF — malware analysis report

Static analysis result for SHA-256 5c8c5022f0f8b270…

MALICIOUS

PDF

45.5 KB Created: 2020-08-04 23:47:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: 9bcda9df716d7d9862e4b039fdfed3f7 SHA-1: 9b08a36d6ecc630722ebb46806042c2daf0d83f3 SHA-256: 5c8c5022f0f8b270ba9670907358efc122f4dabcb7d1e6e6ab3e8c3c3511bac4
194 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, including one pointing to a known malicious redirector. The document body and heuristics indicate a lure for free downloads, likely leading to phishing or malware. The ML classifier strongly suggests maliciousness. No scripts were extracted, but the embedded links are the primary attack vector.

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=cracking+chinese+characters+pdf In PDF document text
    • http://files.perfumeriastore.com/uploads/1/3/1/4/131406885/7886132.pdfIn PDF document text
    • http://files.minneapoliselks44.org/uploads/1/3/0/7/130776725/bolif.pdfIn PDF document text
    • http://lologom.sleepingbunniesbabycoach.com/uploads/1/3/0/8/130874012/delofofex_fatutofisisunu.pdfIn PDF document text
    • http://files.chinchenst.com/uploads/1/3/1/0/131071043/702920.pdfIn PDF document text
    • http://files.signalmountaintravel.com/uploads/1/3/1/3/131379567/pefog-goporaz-mezedivuteledit-sirijekesowuk.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/1/0435/1423/2996/files/88350188270.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6240/2967/files/xofujobewuvuguxefutanariz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/luvibuxunefipefijuli.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9232/8104/files/77074226478.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6430/3522/files/dawuxakibox.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6340/2905/files/pofudusupuk.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9173/8277/files/33588057326.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8886/2622/files/applied_mathematics_1_hr_luthra.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/3725/9938/files/3094168792.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1010/5237/files/blowfish_encryption_algorithm.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4614/1093/files/79161309694.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_off00006493.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6493 3624 bytes
SHA-256: 358c10a901949923da9ba014a0d05e5cc935e8e03c748a90745899114363dc01
font_01_sfnt_off00007195.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7195 5352 bytes
SHA-256: 192de8b4ad0e257a10462d9ce0d61f2774046e6e3d4fb95a95267c22adcb3c6c
font_02_sfnt_off000083c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x83C7 10380 bytes
SHA-256: 36bde92343b37cc3fbecf9e19667f12a2ca14d9871be7e326eba14f66b43ebf8

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