Malicious PDF — malware analysis report

Static analysis result for SHA-256 7897907e1daf5a24…

MALICIOUS

PDF

47.5 KB Created: 2020-08-04 21:36:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 494eff5545dc939d59a5faa7bff4898a SHA-1: d6ecb6d2548d3efb87d4ca28529ed90b357390c4 SHA-256: 7897907e1daf5a24c665065561670253438570e32558b9ec7b9d9d77229fe50c
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous links, including one to a known malicious redirector (ttraff.com), suggesting a phishing or malware distribution attempt. The document body, though heavily obfuscated, contains text related to a 'caterpillar generator service manual', likely a lure to entice users to click the malicious link. The presence of embedded URLs and the ML classifier's high confidence score further support the malicious classification.

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=caterpillar+generator+service+manual+pdf In PDF document text
    • http://files.bluesystem.ca/uploads/1/3/0/8/130814430/buzeno.pdfIn PDF document text
    • http://files.peacefulthoughtstherapy.com/uploads/1/3/2/7/132740804/walutobap.pdfIn PDF document text
    • http://files.jonathanshorter.com/uploads/1/3/1/6/131636725/91207d96d7ad.pdfIn PDF document text
    • http://files.momofallcapes.com/uploads/1/3/1/3/131379205/0f2c0b1d62078.pdfIn PDF document text
    • http://files.topdogservicedogs.org/uploads/1/3/2/6/132681012/samotibavogi-gefajib.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/1/0430/0141/3785/files/61387337167.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8867/4967/files/ribetonadipixuvagazafe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1350/4150/files/newijedukamerakideserax.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/98559129476.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/6007/5427/files/62333327857.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5567/6568/files/81589673546.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/0412/3557/files/kuxoxekuwapoxobusuj.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2749/6087/files/21210932338.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9587/6003/files/madisepumetaterenakujo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0444/3645/5591/files/d_d_monster_manual_3._5.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/6797/2515/files/90072824531.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5723/3576/files/zakirinumusugaragibamix.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/4627/9080/files/salmeterol_davis.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 6

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_off00007a82.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7A82 5440 bytes
SHA-256: 5621cff62fa23babd9d7d3ab0eef2fdf4731d85dfb8843bf570bb01f1fc88296
font_01_sfnt_off00008cf3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8CF3 10364 bytes
SHA-256: e61781c30795aeafec24c833be5621b1b1a465adb5a2ff6225fed4d96ca0a2d2

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