Malicious PDF — malware analysis report

Static analysis result for SHA-256 a8fc91e324b5ca0c…

MALICIOUS

PDF

312.4 KB Created: 2020-08-11 05:11:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: ef56182ee17512a7bfab803f33dd5ccd SHA-1: 108dbb239418aa4a9f04d830e185a60fe1673320 SHA-256: a8fc91e324b5ca0c5c5bf7e43c283fe6e01d7b0431b8a444a82d7b0203da5ecb
134 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to ttraff.com. The ML classifier also flagged this PDF with high confidence. The document body, though heavily obfuscated, contains the same URL, reinforcing the malicious intent. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9890

Heuristics 4

  • 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.
  • 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=berliner+platz+2+neu+glossar+deutsch+englisch+pdf In PDF document text
    • http://fumap.socalttc.net/uploads/1/3/1/4/131406885/megiwikigof_xikimonejur.pdfIn PDF document text
    • http://wosenevim.conversationswiththewomb.com/uploads/1/3/1/4/131483453/zasesukuxezus.pdfIn PDF document text
    • http://vibuke.yupikuity.com/uploads/1/3/2/8/132815002/wekunav_xavobogenanapep_memotinezot.pdfIn PDF document text
    • http://files.bessjacques.com/uploads/1/3/1/3/131379085/2248681.pdfIn PDF document text
    • http://fontawesome.iohttp://fontawesome.io/license/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/1/0441/4016/7320/files/sovisisodo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0445/2201/2831/files/zusovowa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/4136/6951/files/72439046560.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/sejil.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2052/5469/files/15562823994.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/8793/6150/files/tracheobronchial_tree_anatomy.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7889/3214/files/86655341854.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/1868/9434/files/manuale_biblioteconomia.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/3461/4688/files/tepalesesenuforogogikikuv.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0447/5827/0101/files/ciclo_de_vida_de_los_ascomicetos.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0985/8984/files/fupaferufobila.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/5202/2430/files/13600803798.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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000459ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x459AC 1604 bytes
SHA-256: 7f8d84f279369098eff929b81254410c3caa7ba096a52b3ad4234465cd67bf56
font_01_sfnt_off000461d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x461D4 5648 bytes
SHA-256: 51212044e3033e3c1b7d5800a411318bd56f3e8999268dd01d480e1c48c2ff67
font_02_sfnt_off00047503.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x47503 2388 bytes
SHA-256: 916c0bd974339f0a6ce44e8a63980f74a8825687bf76afce9ba3a7ba109f2064
font_03_sfnt_off00047f5c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x47F5C 19580 bytes
SHA-256: 0fe776746ba215c5499fa78a7c135e45cc40acef9b09a944232398ce38bf37c5
font_04_sfnt_off0004b98f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4B98F 16252 bytes
SHA-256: 6321a6493f5be0ebec4b153ba0f748c4e0cd8a42776005d3d9109756ab75c3be