Malicious PDF — malware analysis report

Static analysis result for SHA-256 685c0d864ef4cbe0…

MALICIOUS

PDF

38.1 KB Created: 2020-08-22 16:29:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: edec6272e6b8861a0dda81398be74abe SHA-1: c9698e2d9d0373810aad5b83063cacea175ef6ef SHA-256: 685c0d864ef4cbe0ac7868174ae6f26b8174486119a979837c49da2da811aa1c
194 Risk Score

Malware Insights

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

The PDF contains a link farm and a redirector URL, disguised as free sheet music, which is a common lure for phishing or malware distribution. The ML classifier strongly indicates maliciousness. The embedded links and the document body suggest an attempt to drive traffic to a malicious redirector.

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=free+sheet+music+for+clarinet+choir In PDF document text
    • http://files.yachtrock.biz/uploads/1/3/1/4/131406701/weketowage_sarokowe_xodazizi.pdfIn PDF document text
    • http://files.trapwingfestival.com/uploads/1/3/1/4/131408970/kitirefonug.pdfIn PDF document text
    • http://files.willisband.org/uploads/1/3/0/8/130874683/denim-pizorikur-nepupigasetibul.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/1/0435/4015/2479/files/knowledge_processing_and_applied_artificial_intelligence.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/2303/1720/files/64467356028.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7668/0870/files/22101690783.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/9946/2558/files/36641858581.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/96226605796.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/9432/4888/files/gepalowivisu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/mowojemabedeju.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0576/2974/files/48283759715.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4066/8838/files/detab.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2795/4840/files/why_do_atoms_form_bonds.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3186/3202/files/43315472446.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0454/7280/9126/files/bloons_td_5_monkey_lane_impoppable_guide.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6073/1803/files/45594047335.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 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_off000056c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x56C3 5076 bytes
SHA-256: 92ea23e189218b687e78829f389aecded0aba7c5e09efee7640cc3ef3b665da6
font_01_sfnt_off000067e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x67E4 10436 bytes
SHA-256: 37685821f9eeac4f0827969cff3191dfaf1e0c8810750e49be4d206d02e5e8ec

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