Malicious PDF — malware analysis report

Static analysis result for SHA-256 09d1c567a3b6750d…

MALICIOUS

PDF

42.4 KB Created: 2020-08-20 13:54:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 760943b94646dccc199a2597bd94b28b SHA-1: 5aeb3faa149604bf9f366d86140595c3bd455a4b SHA-256: 09d1c567a3b6750deb29674258a7e66e4797ef2eb83481dade36110ac990b0e9
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a heuristic firing for a malicious redirector link, pointing to `https://ttraff.cc/pify?keyword=bhai+cha+birthday+hd+video+song`. The document body also contains this URL and a list of other PDF links, suggesting a link farm or redirection tactic. The ML classifier strongly flagged this PDF as malicious, indicating a high likelihood of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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.cc/pify?keyword=bhai+cha+birthday+hd+video+song
    • http://files.agrowersgranddaughter.com/uploads/1/3/2/7/132712334/mawofewoje-pibejob-vesidapepexa.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0432/2931/5239/files/tasiwafetotidujijivufe.pdf
    • https://cdn.shopify.com/s/files/1/0431/1384/0793/files/14637323197.pdf
    • https://cdn.shopify.com/s/files/1/0428/6224/8102/files/cardinal_health_annual_report.pdf
    • https://cdn.shopify.com/s/files/1/0440/6562/0118/files/zupidepiworasobefir.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/21086069096.pdf
    • https://cdn.shopify.com/s/files/1/0432/6191/9396/files/51877083176.pdf
    • https://cdn.shopify.com/s/files/1/0431/6659/7288/files/android_camera_tutorial.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005f3e.bin
6b02bbe45618c31d44da662f316de0ba577aa05831093ae132a5f6246d0dc23c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5F3E 5520 bytes
font_01_sfnt_off00007202.bin
a4eb9718d6b4061d191d9fd0f3982791c9bd04c807c076691f6c18e580edb1b7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7202 13612 bytes

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