Malicious PDF — malware analysis report

Static analysis result for SHA-256 3d1c86c1cee4516f…

MALICIOUS

PDF

46.0 KB Created: 2020-08-10 17:47:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 1b8c46e74c3e19e519482e96f94e0a24 SHA-1: 5e99a48a7c3075fe32deebc1b643d2ab7177672c SHA-256: 3d1c86c1cee4516f66b4cc32eddbfb4838bb515b91c9dbd25e500588c2a4d1bd
194 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a critical heuristic firing for a malicious redirector. The document body, though heavily obfuscated, contains a URL pointing to a redirector service, which is a common lure for phishing or malware delivery. The presence of a link farm and the ML classifier's high confidence further support the malicious nature of this document.

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=curso+completo+apicultura+pdf In PDF document text
    • http://files.nddistrictyouth.org.uk/uploads/1/3/1/4/131438460/af55d6.pdfIn PDF document text
    • http://files.spottedvalleyappaloosa.com/uploads/1/3/1/4/131437926/zezazo.pdfIn PDF document text
    • http://files.toritiscia.com/uploads/1/3/1/1/131164130/vopalenexonesowimewo.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/1/0427/7708/4070/files/tafon.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/4016/2467/files/18746049401.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7220/0608/files/62314506699.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3761/3461/files/2547017054.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/66689816557.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/1283/3959/files/setefaguridu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0447/1989/8777/files/media_query_for_desktop.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2181/1362/files/51184304943.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8231/7975/files/wenefuxejuwurotidikigewup.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4424/9499/files/waste_management_recycling.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/4976/0406/files/5.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/6074/6648/files/79172500082.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/5059/8562/files/55065162367.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/4430/5056/files/30964164739.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_off000074ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x74AE 5208 bytes
SHA-256: b8e6e80b7039dbc2af598bdf5f3f40f73c9e682ccb5baa9ca4ec4094d106818b
font_01_sfnt_off0000864f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x864F 11292 bytes
SHA-256: dc16214f591f953c3f5acc4416c02ae3d5bba9093146edf534ee783cf1d48888

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