Malicious PDF — malware analysis report

Static analysis result for SHA-256 e4b2aa670d0f1b71…

MALICIOUS

PDF

49.6 KB Created: 2020-09-05 04:37:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: b6765e6409518a05a619df8ae6f79579 SHA-1: f3317b99c2e118995f7b29fdb28b3a947418e7fa SHA-256: e4b2aa670d0f1b714eaba080ee9161ad27a224091a9627e9c92ec149ff18c980
194 Risk Score

Malware Insights

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

The PDF file contains a significant number of embedded URLs, with a critical heuristic firing indicating a malicious redirector link. The primary malicious URL identified is https://ttraff.me/wix?keyword=astm+a240%252F+a240m+pdf, which likely serves as a gateway to further malicious content. The document body, though heavily obfuscated, also contains this URL and other benign-looking Shopify links, suggesting a link farm or SEO poisoning tactic to distribute the malicious payload.

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.me/wix?keyword=astm+a240%252F+a240m+pdf In 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/1/0429/8499/7025/files/43650165575.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/livoxigugefeguvon.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5850/3590/files/c_split_string_by_comma.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b8c837_202350c6c4b54632af88f8da9d74f51a.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/f95141_d8a620fb915d40f5b306862b7d7fdc1c.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/5097/5910/files/32733729529.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/5680/6553/files/71629405229.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/4089/7181/files/bpsc_65th_syllabus.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/1402/0505/files/99970622665.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b8c837_052f2125847e49058c83956fdea2c9cd.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b8c837_aa0ba7b175c2460bb63e320da8ee3f53.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/bfbc46_aad265da7cf04ffd8d859f61dfa858aa.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005f1c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5F1C 5448 bytes
SHA-256: c9a8c5ee39bea79843492078b61ff13602a2e7cbcdf5e18fe571a94551d86b24
font_01_sfnt_off000071a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x71A3 14920 bytes
SHA-256: 227bb335fb6be8f28ee6632696e27ffd778aa3b595fd02ddd78f8596c381fa9a
font_02_sfnt_off0000a084.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA084 16684 bytes
SHA-256: a858ad06ee9285ef990c8ccf5509e6bce71cae8afc7f99ba8a1dcaf33198b628

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