Malicious PDF — malware analysis report

Static analysis result for SHA-256 da4afe8fd4fc3653…

MALICIOUS

PDF

77.3 KB Created: 2020-08-07 09:01:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: bfc24f16ca60f368bb2eb403566903df SHA-1: 62128fd90a256407a1a6137ce41494bf51ae2308 SHA-256: da4afe8fd4fc36539dd57d57d6b3548ac97b8c1bbd6c18ed4b80d96d255b3856
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a heuristic firing for a malicious redirector link, pointing to 'https://ttraff.cc/pify?keyword=linked+list+algorithm+in+c+pdf'. This URL is presented within the document body, suggesting a social engineering tactic to trick the user into clicking it. The PDF also exhibits characteristics of a link farm, with numerous embedded URLs, further supporting the malicious redirection intent. 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.cc/pify?keyword=linked+list+algorithm+in+c+pdf In PDF document text
    • http://files.kellykeegs.com/uploads/1/3/1/3/131382032/375c7.pdfIn PDF document text
    • http://files.drmeganrodway.com/uploads/1/3/1/4/131413905/kumidowusuje.pdfIn PDF document text
    • http://files.bresumbrella.org/uploads/1/3/1/4/131406275/mokeramaketiwaroveb.pdfIn PDF document text
    • http://files.kvag.net/uploads/1/3/1/3/131380263/cb8d7f.pdfIn PDF document text
    • http://files.greenfieldiowapubliclibrary.com/uploads/1/3/1/4/131438211/b541ff0.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/1/0433/6982/4414/files/33372493778.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7431/3622/files/padolojurokagulipar.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8875/6384/files/80101938099.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/9330/2178/files/wiwujife.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7122/5494/files/44687588145.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/3111/6448/files/talk_dirtyjason_derulo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/3318/2886/files/jaralutazulasazoxe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/8983/6697/files/wevubabakore.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/9083/6645/files/43283509990.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/2207/4534/files/sijixewovofajamelewosupem.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0649/1797/files/27744709222.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/2224/4246/files/brexit_deal_agreement_in_full.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/kuwuvovevikusezavufada.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/1312/8871/files/agriculture_business_plan_examples.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dcd0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCD0 5576 bytes
SHA-256: 94f5ee919a79477a05941c99a843c61d251a2ec602859443e2c36dd05e312b59
font_01_sfnt_off0000efa0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFA0 10212 bytes
SHA-256: 904d740e78c2aa8d12ae91d92f6143520b5f5c1e8dcfc195e71c8a6796a519b7
font_02_sfnt_off0001127c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1127C 16112 bytes
SHA-256: 04c641d0aedeaa8c494855f42a2e9ae6fad9e3679126e7dc5c08fccc4b41c292