Malicious PDF — malware analysis report

Static analysis result for SHA-256 2304a49ed2aedab5…

MALICIOUS

PDF

47.0 KB Created: 2020-08-23 03:42:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 110b4df3f4d8d241e6c89a7a3aae8746 SHA-1: 3466d6751bae9b31b7243dcaba6d71f1858ceed2 SHA-256: 2304a49ed2aedab512ff08cf12603a7bfcfc4cba6a4482b7e7a53a2f4f715320
152 Risk Score

Malware Insights

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

The PDF contains a link farm designed to direct users to malicious infrastructure, specifically identified by the critical PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body, though heavily obfuscated, contains text that appears to be a lure for an instruction manual, aligning with the PDF_SEO_LINK_FARM findings. The primary malicious URL identified is https://ttraff.ru/pify?keyword=barnett+jackal+crossbow+instruction+manual, which is flagged as a known malicious redirector.

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=barnett+jackal+crossbow+instruction+manual
    • http://wirejinu.cre8ivecake.com/uploads/1/3/1/4/131412032/fujenoremod.pdf
    • http://files.thewarningfromgod.com/uploads/1/3/0/7/130775191/3068105.pdf
    • https://cdn.shopify.com/s/files/1/0432/1997/6350/files/kimball_data_warehouse_etl_toolkit.pdf
    • https://cdn.shopify.com/s/files/1/0431/8615/9767/files/71886006264.pdf
    • https://cdn.shopify.com/s/files/1/0430/6265/7177/files/kanuwimezudom.pdf
    • https://cdn.shopify.com/s/files/1/0465/1008/0158/files/48362958461.pdf
    • https://cdn.shopify.com/s/files/1/0431/7049/6661/files/best_annotation_app_for_android_tablet.pdf
    • https://cdn.shopify.com/s/files/1/0431/5791/3749/files/22032534056.pdf
    • https://cdn.shopify.com/s/files/1/0434/2752/8861/files/71399590859.pdf
    • https://cdn.shopify.com/s/files/1/0428/0628/0355/files/98995036502.pdf
    • https://cdn.shopify.com/s/files/1/0431/7996/6628/files/pagination_in_php.pdf
    • https://cdn.shopify.com/s/files/1/0431/2920/8992/files/50933962407.pdf
    • https://cdn.shopify.com/s/files/1/0428/6667/1782/files/dofilisidoruwedakojide.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_off00007843.bin
ac20aff3e3adbebdca2b0e3d69fce8c9b52e7c6e87af693c8989469323eaf853
pdf-font-stream PDF embedded font (sfnt) at offset 0x7843 5368 bytes
font_01_sfnt_off00008a78.bin
678e7cee1d4c6443ede1163b5f2e34c3a6515c2179018b0fce0d0eeff84ed0e8
pdf-font-stream PDF embedded font (sfnt) at offset 0x8A78 10652 bytes