Malicious PDF — malware analysis report

Static analysis result for SHA-256 99db8b6c9311bea5…

MALICIOUS

PDF

41.5 KB Created: 2020-08-02 06:46:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 18b31a13155b7b9e003231ab26379911 SHA-1: bab79a5df700d85a9741ca6cab3029f3c0782dd5 SHA-256: 99db8b6c9311bea53206dc6f7e93940922de79a1f5d7438107dfadce5cb54b68
194 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.com'. This URL is used in a lure related to 'engineering statistics montgomery pdf', suggesting a phishing attempt to trick users into downloading malicious content. The file also exhibits a PDF link farm heuristic, with numerous external links, many hosted on Shopify, indicating a potential SEO poisoning or link distribution scheme. No scripts were extracted from this sample.

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=engineering+statistics+montgomery+pdf In PDF document text
    • http://files.achslinkcrew.com/uploads/1/3/1/6/131607163/xedadu_sesomexido_lebop.pdfIn PDF document text
    • http://files.mattifycosmetics.com/uploads/1/3/1/0/131070751/gaxuluxeposafige.pdfIn PDF document text
    • http://files.mrscolessupersciencesite.com/uploads/1/3/1/1/131164520/fuvosejo.pdfIn PDF document text
    • http://files.larkinswag.com/uploads/1/3/1/0/131071043/4893095.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/1/0439/3782/4926/files/lemod.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6142/7876/files/17872510430.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/2117/2897/files/17700311500.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5799/5160/files/judojomol.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/6555/7671/files/zirafi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/40313354442.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4093/0968/files/folar.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/6359/1583/files/28773590225.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/3097/9495/files/gofizoper.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/4582/1333/files/vamididaxudujupuduxosa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6563/0102/files/fexejerujonuzosofizatob.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/1540/5725/files/rakofejavololumipawob.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 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_off00006389.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6389 5504 bytes
SHA-256: d4b79a76e562de6101fd0d231484510719703332689e3f83d1b6f6b894b4ab4c
font_01_sfnt_off00007643.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7643 10260 bytes
SHA-256: 12a68477b5ba055cb7003cfd83142bfcc9c3335a7502a7fc3c99333d79fd9cd8

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