Malicious PDF — malware analysis report

Static analysis result for SHA-256 ce646b983f566f7d…

MALICIOUS

PDF

42.4 KB Created: 2020-08-09 02:21:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 27f4241e659162552f69283f17b4bd6e SHA-1: 22724786b7539d947df8dda633a0e1e0ac3e35bd SHA-256: ce646b983f566f7d3ed02c66cb21a65c4760f9a9949e925195ad1a163b7c226f
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a critical heuristic firing for a malicious redirector. The document body, though heavily obfuscated, contains text related to 'Turkey bird farming' and the malicious URL. The presence of multiple external PDF links suggests a link farm or SEO poisoning tactic to distribute malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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.
  • 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.
  • 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=turkey+bird+farming+pdf+bangla
    • http://files.yin-tang-therapies.com/uploads/1/3/1/3/131384424/dodinadoseravo.pdf
    • http://files.mseastsclass.com/uploads/1/3/0/8/130814831/setubaruk.pdf
    • http://xalapirip.jamespcampbell.com/uploads/1/3/0/8/130874038/rajixi_korofadares_dudekoxiku_lexenamelinojub.pdf
    • http://xalapirip.jamespcampbell.com/uploads/1/3/0/8/130874038/rajixi_korofadares_dudekoxiku_lexenamelinojub.pd
    • https://cdn.shopify.com/s/files/1/0432/2469/4942/files/90321796114.pdf
    • https://cdn.shopify.com/s/files/1/0435/6141/8913/files/movetarixisukotibuvudiduf.pdf
    • https://cdn.shopify.com/s/files/1/0437/0097/7818/files/zudovisiwijusaz.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/9680354999.pdf
    • https://cdn.shopify.com/s/files/1/0435/3910/3912/files/lafemekiganipinumites.pdf
    • https://cdn.shopify.com/s/files/1/0434/2992/0930/files/fetateteg.pdf
    • https://cdn.shopify.com/s/files/1/0437/9482/5376/files/send_message_to_background_script_chrome_extension.pdf
    • https://cdn.shopify.com/s/files/1/0428/7689/5388/files/37797635787.pdf
    • https://cdn.shopify.com/s/files/1/0428/6749/0975/files/taxak.pdf
    • https://cdn.shopify.com/s/files/1/0440/9013/0584/files/protection_paladin_icy_veins.pdf
    • https://cdn.shopify.com/s/files/1/0433/7798/3653/files/7582138415.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000677a.bin
a1da8a2928ae1b6d7c9ad002bd108a261bdc343ae21c8c4ca35aff819ebfce07
pdf-font-stream PDF embedded font (sfnt) at offset 0x677A 5436 bytes
font_01_sfnt_off000079f4.bin
8ec9504aab82f8cbd9eda7a895b19c7d7c5f6041582a0c559a4b587cc67739ea
pdf-font-stream PDF embedded font (sfnt) at offset 0x79F4 10168 bytes