Malicious PDF — malware analysis report

Static analysis result for SHA-256 91489dd5ac178ef2…

MALICIOUS

PDF

33.7 KB Created: 2020-08-23 03:21:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 324c982a1ec8a96fc010cf9e60a101dc SHA-1: 17b47fd2c1a00798dcb9df287f08a551091b479f SHA-256: 91489dd5ac178ef2d1ceeb95893e6092ab1dea27abbfe241eca14202e1f3343d
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'. The document body, though heavily obfuscated, contains this URL and other Shopify links, suggesting a lure to a malicious site. The ML classifier also strongly flagged this PDF as malicious. The primary attack pattern involves tricking the user into clicking a link that redirects to malicious infrastructure.

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=friendly+letter+template+5th+grade In PDF document text
    • http://fatuz.christiangreenlmt.com/uploads/1/3/2/6/132680981/5244080.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/1/0429/0406/0071/files/vertical_axis_wind_turbine_advantages_and_disadvantages.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9281/1681/files/chrome_full_setup_for_pc.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/6455/5675/files/wagel.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0961/3725/files/wosadas.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7600/1704/files/riwositu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/0796/5345/files/dreams_from_my_father_novel.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0682/8454/files/72589430077.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/5537/2695/files/evading_taxes_report.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0465/3380/4182/files/petupomuv.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/3452/6375/files/zend_avesta_em_portugues.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6581/8789/files/18045888186.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_off00004786.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4786 5376 bytes
SHA-256: a5841f50bbebb12c30a82579bd188d288c4f8f47c158b863c32a088d8414dba0
font_01_sfnt_off000059ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x59AB 9624 bytes
SHA-256: 323e6357168ab06cc9df796de6ddbdb53644b65f45c50d68092cc44aa25538d9

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