Malicious PDF — malware analysis report

Static analysis result for SHA-256 9c47fd1b0ffb0f8c…

MALICIOUS

PDF

43.7 KB Created: 2020-09-08 18:11:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 23300aeeac501719efa68e0e69d3c572 SHA-1: 98f4d891c61789842fe442ed44571770e512c47d SHA-256: 9c47fd1b0ffb0f8c4d36efe9d5aefce26ae5baf2a16c7a852c2c75ddc0363718
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF file was flagged as malicious by a machine learning classifier and contains numerous embedded URLs. One of these URLs, 'https://ttraff.me/pify?keyword=bhilwara+mil+gayi+re+video', is identified as a malicious redirector. The file also exhibits characteristics of a link farm, with many external PDF links, suggesting a broad distribution attempt. The presence of the malicious redirector indicates an attempt to lure users to a harmful destination.

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.me/pify?keyword=bhilwara+mil+gayi+re+video
    • https://static.usrfiles.com/ugd/35e1ce_f5491ee2e24a47cdb5e2c9cfd87e8f46.pdf
    • https://static.usrfiles.com/ugd/b8c837_ec98312f23d4465883f3d64519f1ab75.pdf
    • https://static.usrfiles.com/ugd/a76634_bd2038c689644c7988272ebe20e43663.pdf
    • https://static.usrfiles.com/ugd/e1d58f_7272cad915a34b6e8c640678631e80f4.pdf
    • https://cdn.shopify.com/s/files/1/0430/5387/5357/files/cgt_retirement_exemption_rollover_form.pdf
    • https://cdn.shopify.com/s/files/1/0438/3503/1712/files/wutifabaxawururi.pdf
    • https://cdn.shopify.com/s/files/1/0441/3744/7576/files/apache_tomcat_for_ubuntu_64_bit.pdf
    • https://cdn.shopify.com/s/files/1/0438/8945/9368/files/20177365668.pdf
    • https://cdn.shopify.com/s/files/1/0431/3337/0522/files/maps_of_meaning_audiobook.pdf
    • https://static.usrfiles.com/ugd/185811_4e4448b44f0f47028cc6e1e07a91a64a.pdf
    • https://static.usrfiles.com/ugd/10e3af_f430487db367439daadf85cc0b2cfa90.pdf
    • https://static.usrfiles.com/ugd/b8c837_440de4ebf1b74d029d3a641760ac66de.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000053e8.bin
145f5c6600298143b6f1dc753746228e2a3710f6d6c169925d61bdd022ccc021
pdf-font-stream PDF embedded font (sfnt) at offset 0x53E8 4968 bytes
font_01_sfnt_off000064da.bin
cfe20f48852b6c9a76c0393235b5508957349fc3d5e717841374b84cce894fca
pdf-font-stream PDF embedded font (sfnt) at offset 0x64DA 15348 bytes
font_02_sfnt_off00009428.bin
4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3
pdf-font-stream PDF embedded font (sfnt) at offset 0x9428 4324 bytes