Malicious PDF — malware analysis report

Static analysis result for SHA-256 6cc28dc48cb921bb…

MALICIOUS

PDF

44.4 KB Created: 2020-08-15 19:42:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 1420bedb09eac615b53656e062488d69 SHA-1: d08ac345554d1c089eed132b0a7a10b289caaf1b SHA-256: 6cc28dc48cb921bb8aaaac44635cf83ea4224c85b8cf6bc184c66fc2f4c19c41
194 Risk Score

Malware Insights

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

The PDF contains a link disguised as a free manual download, which redirects to a known malicious infrastructure. The ML classifier strongly indicates maliciousness, and the presence of numerous external links suggests a link farm or SEO manipulation tactic to distribute malicious content. No scripts were extracted, but the embedded URL is the primary indicator of compromise.

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/wb?keyword=singer%20stylist%20514%20manual%20free In PDF document text
    • http://jovupeje.sylviezannier.com/uploads/1/3/1/6/131606289/zilumun.pdfIn PDF document text
    • http://sagonuzim.americanlegionpost555.com/uploads/1/3/0/7/130776791/1435077.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/1/0433/8181/7495/files/3_point_turn.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/0733/6863/files/marathi_kadambari_rau_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9289/4115/files/93942637257.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/9440/8352/files/2591403572.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/4758/1856/files/abrao_de_pai_joo_pdf_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5477/5970/files/zepolipubajididujebitodev.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6130/4728/files/94930406654.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8749/5321/files/jopaponofopazafe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1044/0859/files/2015_ford_edge_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/6382/6849/files/kitz_butterfly_valve_catalogue.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/4777/8469/files/96790033521.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6577/8080/files/87161229699.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_off00006c4c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6C4C 5556 bytes
SHA-256: 403f53f3ef799204a4dfc06ae7b35f834e0e824fe98027b481079111303ea835
font_01_sfnt_off00007f2c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7F2C 11032 bytes
SHA-256: cbd7514185647e358c262ec7d0be25e4fd3c176aa9e8e09151deafec30eb642e

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