Malicious PDF — malware analysis report

Static analysis result for SHA-256 cb5812f0c016cd03…

MALICIOUS

PDF

34.3 KB Created: 2020-08-10 20:32:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: 9eccccb99af621b618b884ebabcfd0c1 SHA-1: bee503ebeac343211a85ca746430c254146b88b8 SHA-256: cb5812f0c016cd03edc8405daf4634e26cc053850f47e9c99f87620f82574ca5
194 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one specifically identified as a malicious redirector. The document body, though partially garbled, suggests a lure for a free PDF download. The primary malicious link, https://ttraff.com/pify?keyword=bastien+piano+basics+level+2+pdf+free+download, is designed to redirect users to potentially harmful content. The presence of a large number of external PDF links further indicates a link farm or SEO manipulation tactic.

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.com/pify?keyword=bastien+piano+basics+level+2+pdf+free+download In PDF document text
    • http://fedadizu.purpleribbonpublishing.com/uploads/1/3/0/7/130738799/cec463bcdac6.pdfIn PDF document text
    • http://files.anglesborons.com/uploads/1/3/1/6/131637589/9a1c6b88.pdfIn PDF document text
    • http://files.powsfsu.org/uploads/1/3/2/6/132695601/4443856.pdfIn PDF document text
    • http://fodijojim.kushyboutique.com/uploads/1/3/0/8/130874284/wewawabekinewuwur.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/1/0427/8976/5279/files/zolomibotin.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/9743/7848/files/samajolivu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/6196/7013/files/59607360653.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/2406/3392/files/roblox_paid_exploits.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3264/0679/files/42358466143.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/6951/9510/files/60429570041.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7700/8550/files/majiwazutowudabarexu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/8145/0147/files/bofugodawizexiwomevilu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8749/5321/files/vimimuxizemutun.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
🗂 Part of campaign: apriloliviaroskos.com 6 samples

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_off0000472c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x472C 5624 bytes
SHA-256: cdb71827cee38d2c2f1bff11fa0032df865b7dcc3f2190cc33e1eb6c77636d61
font_01_sfnt_off00005a61.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5A61 9952 bytes
SHA-256: 7463a7b74fa127c6991921571937e37a769c03c4a1d8d5a7f0ccc1ca09e35ae6

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