Malicious PDF — malware analysis report

Static analysis result for SHA-256 fd53f8b8cf2e400e…

MALICIOUS

PDF

50.5 KB Created: 2020-09-16 21:32:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: ddcbe11c20bfbe5ed5443bd9edb710ba SHA-1: a2487e93fec0b874556fbdc41dc272aedb0a47a3 SHA-256: fd53f8b8cf2e400e7201704d92ab71fac75253ff1600e1b9bc22cf7a8ca62864
184 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one critical heuristic identifying a link to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains text related to 'Savage Worlds toughness calculation' and a URL that appears to be part of a lure. The presence of many external links suggests a link farm or SEO poisoning attempt to drive traffic to malicious sites. No scripts were extracted, but the PDF structure itself is used to host and deliver malicious links.

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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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.link/wix?keyword=savage+worlds+toughness+calculation In PDF document text
    • http://nonafe.killarabyod.com.au/uploads/1/3/1/3/131398140/16321.pdfIn PDF document text
    • http://files.roswellnorthmusic.com/uploads/1/3/1/8/131856723/fokimu-gubetiwem-fenaxalisep-jixetekof.pdfIn PDF document text
    • http://nefaj.fijileaks.com/uploads/1/3/2/6/132682787/5ff1ce29ca22.pdfIn PDF document text
    • http://files.aquabydesign.co.uk/uploads/1/3/1/4/131408970/gilixutepasuromugum.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://debdfb44-181e-46b5-ac10-c278f960bff8.filesusr.com/ugd/d1c05f_1bfa1cd65ff746d884b7d175c5739821.pdf?index=trueIn PDF document text
    • https://fe4c9c8d-c2f2-4ae8-9e53-7eec50c502f4.filesusr.com/ugd/277b62_c70ec0c622f6463daeeacb160a2a7fc0.pdf?index=trueIn PDF document text
    • https://0b561bd9-71d7-4901-a855-a1b555beb445.filesusr.com/ugd/dc8a8e_90bf3d32d7104061955bd16486661911.pdf?index=trueIn PDF document text
    • https://5de74dab-1b64-45ee-9bfc-64076b877f63.filesusr.com/ugd/595093_68fa166ee259412b988c3ce3db34d371.pdf?index=trueIn PDF document text
    • https://90f459f5-8ad9-4e10-9f58-aac4f3c20ccf.filesusr.com/ugd/54dfea_eaf2a0985de141438a205158457d75e6.pdf?index=trueIn PDF document text
    • https://1d6efe7f-ded5-402e-a8c3-fc03b539ce30.filesusr.com/ugd/4b874d_493ff9311cad471e99eef78633559698.pdf?index=trueIn PDF document text
    • https://a05ec3c7-d6a8-4cb5-a6ce-6b4f7d1fd93e.filesusr.com/ugd/ea2c45_6c5cb13810de4c078d196f08d4473fc5.pdf?index=trueIn PDF document text
    • https://7170d7ea-6863-4b3f-93b8-6fd63f013c93.filesusr.com/ugd/d4579c_2108f4ba561b4e3fb0f88dbd0d1b4b97.pdf?index=trueIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/3503/9656/files/yowhatsapp_7._99_anti_ban_apk.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/1511/6696/files/lcd_2004_i2c_datasheet.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/7819/6129/files/50739658003.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000085b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x85B3 5456 bytes
SHA-256: 498be6330fd68b1a5365db067baf202f50da86d92772f2fd48af413d10d8867e
font_01_sfnt_off0000984f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x984F 10668 bytes
SHA-256: eab62897637cc2e082e90803580da78641d37af4dee54799c23d77cababae25b