Malicious PDF — malware analysis report

Static analysis result for SHA-256 86270dc81f493ef7…

MALICIOUS

PDF

41.8 KB Created: 2020-08-18 23:48:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 3b65428c9be49c1e95f68082b557f3f9 SHA-1: bfcc79fed2051c099864561808af4983fd2dfc1e SHA-256: 86270dc81f493ef7073c0c4375623c2c7295b2b433e723a8c44a4137ba94d381
162 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a prominent link disguised as a free software download for 'Autocad free for mac os x'. This link, https://ttraff.cc/pify?keyword=autocad+free++for+mac+os+x, redirects to known malicious infrastructure. The document also features a mass external PDF link farm, indicating a likely SEO poisoning or spam campaign to drive traffic to malicious sites. The ML classifier strongly flagged this PDF as malicious.

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.
  • SEO-redirector lure link (multi-word utm_term) low PDF_SEO_UTM_REDIRECTOR_LINK
    PDF contains a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the search-keyword gateway used by the 'free document download' phishing family. Surfaced as an IOC; on its own this is a low-confidence signal.
  • 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=autocad+free++for+mac+os+x In PDF document text
    • http://files.sampayton.com/uploads/1/3/1/1/131163540/dbf14b84a.pdfIn PDF document text
    • http://files.reclaimedtreasuresaz.com/uploads/1/3/0/7/130738779/kalubir-bewuzo.pdfIn PDF document text
    • http://files.iloveartstudio.com/uploads/1/3/1/4/131483318/bidazaliko.pdfIn PDF document text
    • http://files.pineywoodsaudubonsocietytx.org/uploads/1/3/1/4/131437477/munorepuxomu.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/1/0439/4467/3448/files/98308622119.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/6968/6431/files/dopoworilijilukanozir.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6641/6549/files/pitew.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4617/4877/files/dreamscene_window_7.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/9966/1223/files/70509456457.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/0609/9605/files/living_religions_9th_edition_free.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5190/8249/files/14096091578.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/4160/4263/files/52999863568.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_off00006738.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6738 5192 bytes
SHA-256: 44612adb0d2c6c0748743bbc5763814452a0f7778067dd17bb90248dbe74f800
font_01_sfnt_off000078c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x78C6 9824 bytes
SHA-256: 44ff63fafd1ee64de2e4ac0a285b04c55011c9a64ea3f25f53d7980e6018afc8

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