Malicious PDF — malware analysis report

Static analysis result for SHA-256 86c61f11d4d26a03…

MALICIOUS

PDF

44.4 KB Created: 2020-08-22 19:44:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 7a3f46534f52a576dc8be5762e04128a SHA-1: f78e8e704a35cf0c29fb5f6f1dd8dafb73c1faa2 SHA-256: 86c61f11d4d26a039334884929c9fa39e7d310031b4dc18b2fcfc243dff3e627
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links, many of which point to a redirector service. The primary redirector URL is associated with known malicious infrastructure, suggesting a phishing or scam attempt. The document body, though heavily obfuscated, contains a URL that matches the primary redirector, reinforcing the malicious intent.

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=minecraft+1.+12+2++windows+10 In PDF document text
    • http://files.hollenbackpianostudio.com/uploads/1/3/0/7/130775678/4919725.pdfIn PDF document text
    • http://files.aim4tri.com/uploads/1/3/1/6/131636845/3e31b1271a4b2a.pdfIn PDF document text
    • http://files.sterlingenterprisesllc.com/uploads/1/3/2/6/132681296/guwijore.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/1/0434/5331/7272/files/vehicle_insurance_details.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6704/0154/files/97513410516.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/0261/0335/files/27958569770.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/5594/6655/files/autocad_electrical_sample_drawings_free.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9352/4637/files/51173966799.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2785/6536/files/xibiruvufatudip.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/5117/0457/files/wutenev.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/2943/6315/files/86114718484.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/8544/7833/files/felel.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/7697/4747/files/52380472469.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/1644/4315/files/25780718543.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/9513/7187/files/neon_trees_animal_lyrics.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/pajovi.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 5

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_off00006ef6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6EF6 5436 bytes
SHA-256: b35f3413365441114c1617c8cdb5198f8a1ca6751d5477795c3c4d18a606ac24
font_01_sfnt_off00008196.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8196 10284 bytes
SHA-256: 525decabc1e791f211e1289834d7ecbc20af50b3e3e51e2491d91dc26a34f74d

Open this report in the interactive analyzer, or submit your own file for analysis.