Malicious PDF — malware analysis report

Static analysis result for SHA-256 ec13efaaab72bca9…

MALICIOUS

PDF

46.3 KB Created: 2020-08-23 23:57:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 5990395cb299d58ad0dc6964eeb9e504 SHA-1: 811e0d7695d0cfac96c58d059d36f2ec9475ee04 SHA-256: ec13efaaab72bca96c354ef2d195f39766db9afd4053cabc94fa3002931a411b
214 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link T1059.001 PowerShell

The PDF contains a link farm and a specific URL pointing to a redirector, indicating a malicious redirection attempt. The document body, though heavily obfuscated, contains text related to 'Aluminized steel sheet welding' and a URL that appears to be part of a SEO spam campaign. The presence of a callback lure suggests a potential social engineering tactic to engage the user further. The primary malicious URL identified is https://ttraff.cc/pify?keyword=aluminized+steel+sheet+welding.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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=aluminized+steel+sheet+welding In PDF document text
    • http://files.firststepcleburne.com/uploads/1/3/2/3/132303286/3077189.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/1/0433/3967/7855/files/cnis_cadastro_nacional_de_informaes_sociais_dataprev.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/2534/9283/files/wilupuganasonexaridopimam.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/5109/6981/files/21139967737.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/4146/5244/files/davodapawuvapagexewal.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/5671/6186/files/57437434002.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/7007/6566/files/74020623016.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4852/5208/files/fovasijurivakigudovisuli.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2052/5469/files/24231071469.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/17721531589.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/6244/2661/files/66138647675.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/7467/3057/files/interview_questions_for_marketing_manager.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 2

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_off00007799.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7799 5064 bytes
SHA-256: c5f1583dd4c20f0e800690727acfbb638f03786ea840b4955b715b41b13315cd
font_01_sfnt_off000088c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x88C0 10468 bytes
SHA-256: 37cd6b4be256577f9cd5965c5fa8b552875c3d2439b7522026bbb40aabb14f3d

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