Malicious PDF — malware analysis report

Static analysis result for SHA-256 d8b7b187b7fd72b2…

MALICIOUS

PDF

43.5 KB Created: 2020-07-26 13:47:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 41720412cc12a4629609a8a072d94f21 SHA-1: fdfe1fd0da90fe4fe966b694bab2518a2e9cec1b SHA-256: d8b7b187b7fd72b294c1ab9fc1eb6679c5968ee2d9d84bc7c025676da69761a9
194 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to external PDF files hosted on various domains. One critical heuristic indicates that the PDF links to known malicious redirector infrastructure, specifically 'ttraff.cc'. The document body, though heavily obfuscated, contains text related to 'California autopsy reports public record', likely a lure to entice users to click the malicious links. The presence of numerous external PDF links suggests a link farm or SEO poisoning tactic to distribute malicious content.

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=california+autopsy+reports+public+record In PDF document text
    • http://files.regencyparkcary.com/uploads/1/3/0/8/130874587/1544936.pdfIn PDF document text
    • http://files.streetlynxshop.com/uploads/1/3/1/3/131379353/xojizekunobufewak.pdfIn PDF document text
    • http://files.actonhistoricalsociety.org/uploads/1/3/0/8/130813730/4842479.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/1/0430/1350/5185/files/75698154259.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/3161/7945/files/forakolekewamep.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6001/8852/files/katafiguvosuseponuwuval.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7103/6822/files/33804208839.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/bijalikupuxamimidesedol.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7973/7237/files/72327922764.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0044/6626/files/83206705111.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/0427/8422/files/vetanudidivemugidawogom.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/tuwaz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/3851/4071/files/84461081950.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
🗂 Part of campaign: prairiefirebordercollies.com 4 samples

Related samples 8

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_off00006cb5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6CB5 5296 bytes
SHA-256: 4a1ad2f3b0ee8f3f4e368c2dc205063a842525ee915df173d0355f9195acf52c
font_01_sfnt_off00007ec7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7EC7 10028 bytes
SHA-256: cbf171f977072fd5d56517b6b40a665cbd9c1530f5663ac35d17edd571fe757e

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