Malicious PDF — malware analysis report

Static analysis result for SHA-256 fd108245060bdf22…

MALICIOUS

PDF

36.8 KB Created: 2020-08-31 15:42:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: dcc0ae1ae102d193ae2fef46ea056d45 SHA-1: 3e57f08f48c7ade729ec1bb477931af8211b3c0b SHA-256: fd108245060bdf224c9e4d53179a2b9b1a5459ac7f93fb9067d34fec4753beb1
152 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to a redirector service. The primary link identified, 'https://ttraff.com/wix?keyword=all+animals+photos+pdf', is flagged as malicious. The document body, though heavily obfuscated, contains this URL and appears to be a lure for users interested in animal photos. The presence of numerous 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.com/wix?keyword=all+animals+photos+pdf
    • https://static.usrfiles.com/ugd/b8c837_2f6107fba7ee425ba769464669ef6d58.pdf
    • https://static.usrfiles.com/ugd/225520_4349ed2e80d94e6db7e60539d476c239.pdf
    • https://static.usrfiles.com/ugd/de02f3_c7d27e15099e41ea96d0775677744557.pdf
    • https://static.usrfiles.com/ugd/24853a_a225fad78d444b47acdccd70699f1f99.pdf
    • https://static.usrfiles.com/ugd/b4609a_7d4f473bca8941ed89db07978f4cbcfa.pdf
    • https://static.usrfiles.com/ugd/b8c837_cc49fc282ce94bc688b41131689e017e.pdf
    • https://cdn.shopify.com/s/files/1/0434/3663/8369/files/vemawoxiligapabiji.pdf
    • https://cdn.shopify.com/s/files/1/0432/7846/7222/files/38251690478.pdf
    • https://cdn.shopify.com/s/files/1/0435/0499/2408/files/22062243708.pdf
    • https://cdn.shopify.com/s/files/1/0436/3649/0398/files/ipcc_audit_amendments_for_nov_2020.pdf
    • https://cdn.shopify.com/s/files/1/0433/1231/6584/files/diwom.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/womonevixaxijebuvi.pdf
    • https://cdn.shopify.com/s/files/1/0437/8417/5768/files/biotecnologa_y_mejoramiento_vegetal.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_off00004766.bin
e966edc8aef552e938c333587cecc64342264b2b4b2b9017783eafa47a5a7ab5
pdf-font-stream PDF embedded font (sfnt) at offset 0x4766 4844 bytes
font_01_sfnt_off000057a2.bin
4b0426370b52d5b55b86fe945a116938c7d75ab91efb78c7c78dc7a557e9c384
pdf-font-stream PDF embedded font (sfnt) at offset 0x57A2 9636 bytes
font_02_sfnt_off0000787c.bin
ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3
pdf-font-stream PDF embedded font (sfnt) at offset 0x787C 4324 bytes