Malicious PDF — malware analysis report

Static analysis result for SHA-256 9dd7f6821e01fc0f…

MALICIOUS

PDF

41.4 KB Created: 2020-08-06 14:58:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: ee6853bf936e5f6a8ba988a559f63060 SHA-1: 7728a35aff3929d7a79042735eea20957fc8b4ea SHA-256: 9dd7f6821e01fc0fc2400ae07460bf747cef3efcff8df3ee960e759d9a627e33
194 Risk Score

Malware Insights

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

The PDF contains a mass of external links, including a critical redirector link to 'ttraff.cc'. The document body, though heavily obfuscated, contains the same text as the malicious URL, suggesting a lure. The ML classifier strongly flagged this PDF as malicious. The primary attack pattern involves redirecting the user to malicious infrastructure via the embedded links.

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=risk+assessment+theory+methods+and+applications+pdf In PDF document text
    • http://files.thetarshnetwork.com/uploads/1/3/1/3/131384583/ba615d8b2ce.pdfIn PDF document text
    • http://files.waterselementary.org/uploads/1/3/0/9/130969505/9623557.pdfIn PDF document text
    • http://files.baldmannhumans.com/uploads/1/3/1/4/131438759/3870645.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/1/0438/9987/9576/files/elite_dangerous_cobra_mk_iii.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/2378/5370/files/34704216482.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/3789128943.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/8015/4269/files/metotipivulobulajonegar.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/munununexarusod.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9954/4984/files/90011470871.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/8271/8115/files/5486333475.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6856/3355/files/32949338226.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1613/4562/files/giredesupow.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/0327/3628/files/pafojidifoxazixesubew.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1787/1255/files/33703077881.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0446/8133/0841/files/vineland_adaptive_behavior_scale.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5086/8646/files/el_bestiario_herr_dunkelheit.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 4

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_off0000612b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x612B 5568 bytes
SHA-256: 0c151e707ea6ba99157462975c21630ca070d1b49a8057405ca85fc7a32fef50
font_01_sfnt_off00007405.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7405 10772 bytes
SHA-256: 02a6e64990c6a3afe2a75764f7803b0b4ffc08a2adb4f55fec628957701672e0

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