Malicious PDF — malware analysis report

Static analysis result for SHA-256 f8a6e9de43f6b55a…

MALICIOUS

PDF

54.4 KB Created: 2020-08-12 11:53:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 5f84f7f93180b273efdbaa38ac30973b SHA-1: 6ffcf4fddc1c60c713c4288b6069968aab3752f5 SHA-256: f8a6e9de43f6b55aaed02936844e98afa650636a835a64c8ba6babd056a75ad6
194 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to external PDF files hosted on various domains. One critical heuristic firing indicates that the document links to known malicious redirector infrastructure at 'ttraff.cc'. This suggests the document is designed to lure users into clicking malicious links, likely for phishing or malware distribution. 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/wb?keyword=espressor%20manual%20krups%20calvi%20xp3440 In PDF document text
    • http://jorur.marcsoutdoorfurniture.com/uploads/1/3/2/8/132815028/3923113.pdfIn PDF document text
    • http://gulobof.marinpersonalshopper.com/uploads/1/3/2/3/132303027/9171540.pdfIn PDF document text
    • http://kojuwu.buildingspecscorp.com/uploads/1/3/0/8/130814328/1af91d77cc.pdfIn PDF document text
    • http://files.gmckillington.org/uploads/1/3/1/4/131453902/3573926.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/1/0434/7917/1222/files/causes_of_peptic_ulcer.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3257/5132/files/xegidusuzesomoxep.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/1783/7467/files/vokubagigiwikexajamef.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/7967/2735/files/sexor.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9289/3093/files/91426765553.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/5848/7703/files/best_app_annotate_ipad.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/4616/6943/files/surutepowonuburunefeni.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0445/9456/1188/files/balochistan_textbook_board_quetta_books.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/5115/5618/files/jiwexesibo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/2017/3983/files/bestiariusz_sowiaski._cz_pierwsza_i_druga.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000760e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x760E 5620 bytes
SHA-256: e0064eda5440dda2a2822197288bce9aa876360d17dacfca3bc0b0a946af7448
font_01_sfnt_off0000891b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x891B 1800 bytes
SHA-256: daad3f347a4f42f432ee9983e619a7c063e36761dba5934b469418034847e28e
font_02_sfnt_off000091a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x91A9 10420 bytes
SHA-256: cf464eb11920b7971e6c728267f64123158cb27e64b816c8fd169853f3743a59
font_03_sfnt_off0000b581.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB581 16648 bytes
SHA-256: 8a76440899557fe8e3d58d35c1160fa3b53ffd0da5388da1bb89fb7250de6a45