Malicious PDF — malware analysis report

Static analysis result for SHA-256 8784593d27e9bd5c…

MALICIOUS

PDF

40.0 KB Created: 2020-08-31 13:48:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: fd40f1a6e189b1e768fc350e25fde537 SHA-1: cd36e334f9660e84404af914b91fd90ee5374246 SHA-256: 8784593d27e9bd5cd1370229ed6d0bb0bd4a90a2fde809242a1877924e54b108
152 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.cc, which is designed to lure users into clicking on further malicious links. The document body, though heavily obfuscated, contains text related to 'best performing managed portfolios' and includes the malicious URL, suggesting a phishing or scam attempt. The presence of a large number of external PDF links also indicates a link farm, likely for SEO manipulation or to host further 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.cc/pify?keyword=best+performing+managed+portfolios
    • https://static.usrfiles.com/ugd/b8c837_189295f9b67f465890b07b2c896eb7bb.pdf
    • https://static.usrfiles.com/ugd/857e61_3049abbe971e440989887bf121804289.pdf
    • https://static.usrfiles.com/ugd/b8c837_2769f8438b554bbfa0dcfb48b0edcc55.pdf
    • https://cdn.shopify.com/s/files/1/0438/0665/4626/files/puzirivipamofinegif.pdf
    • https://cdn.shopify.com/s/files/1/0429/7352/8213/files/21925292199.pdf
    • https://cdn.shopify.com/s/files/1/0438/9126/1595/files/47293705096.pdf
    • https://cdn.shopify.com/s/files/1/0432/8056/4392/files/gutititizasurovufijo.pdf
    • https://static.usrfiles.com/ugd/8ab72e_091276c46a484acabf16a391b4c5c9dd.pdf
    • https://static.usrfiles.com/ugd/0fdb6d_877f888bba1146e8bd7eda56334d868d.pdf
    • https://static.usrfiles.com/ugd/b8c837_f5d37feffc15469badd09f3a45dd958d.pdf
    • https://static.usrfiles.com/ugd/d9d1f5_912224700e164a41beae8a2e3b60ae2f.pdf
    • https://static.usrfiles.com/ugd/58a813_1c8e2fe370f64f9f8717be5f2221f1f4.pdf
    • https://static.usrfiles.com/ugd/9a242c_f47ba181a3dd4dcaa93e4b43a2829931.pdf
    • https://static.usrfiles.com/ugd/b8c837_41ac5ccd51e14f04a62e0b6039b684e1.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_off00005d3b.bin
3327ab5aa34454b18303ffed8daf0f7859225e1de67837821d97d403779491d2
pdf-font-stream PDF embedded font (sfnt) at offset 0x5D3B 5408 bytes
font_01_sfnt_off00006f89.bin
16bdfb4cd691e8abdb382c0cb91d90f029abdbcaf31873533cddc58342ce9479
pdf-font-stream PDF embedded font (sfnt) at offset 0x6F89 10744 bytes