Malicious PDF — malware analysis report

Static analysis result for SHA-256 bf6fe4a2bf6cc964…

MALICIOUS

PDF

62.0 KB Created: 2020-08-11 12:47:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: a99133764d4ed28b14dd9592d3d74847 SHA-1: c9a94a96d40ee3a0718fdc8bf9ce53b829ddd029 SHA-256: bf6fe4a2bf6cc964789892486a480cae59035fd654855e300230726ec5fbb2b7
194 Risk Score

Malware Insights

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

The PDF document was flagged as malicious by a machine learning classifier and contains a critical heuristic indicating it links to known malicious redirector infrastructure. It also exhibits characteristics of a PDF SEO link farm, with numerous embedded links. The primary malicious URL identified is ttraff.ru, which is likely used to redirect users to further malicious content. No scripts were extracted, limiting the analysis of direct payload execution.

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.ru/pify?keyword=synchronous+motor+definition+pdf In PDF document text
    • http://files.biscuiteering.com/uploads/1/3/1/3/131381881/ruvokuzamodexum-xubaxareniviw-vugif-kolijotixesa.pdfIn PDF document text
    • http://files.buymyoldvehicle-peterborough.co.uk/uploads/1/3/2/7/132740281/5246691.pdfIn PDF document text
    • http://files.mariejoseehullcounselling.com/uploads/1/3/0/7/130739210/689608.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/1/0432/8187/5104/files/acknowledgement_of_paternity_texas.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/8072/1311/files/small_engine_carburetor_tuning.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0546/8068/files/92878944316.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/0775/1838/files/kezufazo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0443/4444/3036/files/malaysia_business_law_book.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/7952/4759/files/better_call_saul_s03e09_torrent.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7729/5516/files/foundations_of_college_chemistry.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5522/6778/files/xewux.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5569/3470/files/59459675677.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4929/5776/files/30857741461.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1555/2674/files/rijogix.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/7689/5398/files/88164845620.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6246/0577/files/newuzerimizuvufo.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_off000096fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x96FB 5356 bytes
SHA-256: 49a68ba5c6e95013c009e130da187fe5cea5d2b410915b70cb74a3ab00dec195
font_01_sfnt_off0000a905.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA905 14360 bytes
SHA-256: a5e8e25ef8671653f0a30b14727d85e5879f5410fcfa814fd9229c20b175f125
font_02_sfnt_off0000d642.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD642 16036 bytes
SHA-256: 354dce64f07f3d7acdf6a04edf763950ffbfec4edcbb4bfe17b65a83544077bb