Malicious PDF — malware analysis report

Static analysis result for SHA-256 b77b9dda8fa1880d…

MALICIOUS

PDF

41.4 KB Created: 2020-08-09 15:07:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: cc5cb53c13b3fddcc7516fea70c83652 SHA-1: 3d75dea670f8f6abd39976dfd1f03fd84815cc93 SHA-256: b77b9dda8fa1880da3fbb028d63831211749147d99dbdea3900ecb77b37e48e9
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a large number of embedded links, many pointing to Shopify domains, but one critical link directs to a known malicious redirector at ttraff.com. This suggests a link farm or SEO poisoning tactic designed to funnel users to malicious content. The ML classifier strongly supports the malicious verdict. No scripts were extracted, and the document body is heavily obfuscated, but the presence of the malicious redirector 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.com/pify?keyword=architecture+competition+annual+pdf In PDF document text
    • http://files.briancarnold.com/uploads/1/3/1/1/131163832/gutogowimogovimej.pdfIn PDF document text
    • http://files.almamusicstudio.com/uploads/1/3/1/3/131398091/zubopurula_mifesefujap_minafeguxe.pdfIn PDF document text
    • http://mapul.youngsingersacademy.com/uploads/1/3/1/3/131379362/825837.pdfIn PDF document text
    • http://pujasi.socialmultiplicity.com/uploads/1/3/2/6/132681947/wosuwadivis_samafimewoxep_dobozewas_disizozubexome.pdfIn PDF document text
    • http://files.msbui.com/uploads/1/3/2/6/132681560/kuvijexepev.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/1/0430/4135/7973/files/tasufe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/3217/2965/files/42296246059.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8094/1721/files/rumuworimujajomafofut.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0923/6374/files/74696684599.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0325/6737/files/airbnb_ipo_prospectus.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6232/8472/files/gijudija.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9691/5621/files/2529884986.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6840/7464/files/86445495004.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/4282/4614/files/42411747486.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/2518/4421/files/6117198981.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/5009/9100/files/fuzoxa.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: almamusicstudio.com 3 samples

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_off000064b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x64B3 5204 bytes
SHA-256: 1bd19606c837fa0a7559cbbf70a8ba1de898f747ae529d3f3b8886767f0f9b98
font_01_sfnt_off0000763f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x763F 10208 bytes
SHA-256: 067ddae5e0f90aa289a8655c5f5e94a1c85bcf6097ee2bd239d6c8a19150ef2f

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