Malicious PDF — malware analysis report

Static analysis result for SHA-256 732f0701c76d542a…

MALICIOUS

PDF

50.8 KB Created: 2020-08-05 09:00:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bf633f5af22b7a130e21c24c214a81b2 SHA-1: 1e431ed74d9a1f636d169dcae0223a67514f65f3 SHA-256: 732f0701c76d542a0b04683bf25b01f50f209eb3aba5a0131b642f4ec00638a6
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for linking to known malicious redirector infrastructure, specifically 'ttraff.ru'. The document body, though heavily obfuscated, contains a URL that mirrors the suspicious redirector. This suggests the PDF is designed to redirect users to malicious content, likely for phishing or malware distribution.

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=accounting+and+financial+statement+analysis+pdf
    • http://files.drterry4ny.com/uploads/1/3/0/7/130740589/joliwevotupudur.pdf
    • http://files.artdwellers.com/uploads/1/3/1/4/131406369/jerusakesiridaruta.pdf
    • http://files.whitepeacockcoffee.com/uploads/1/3/1/4/131436971/7dad80.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0427/9504/0924/files/92021170253.pdf
    • https://cdn.shopify.com/s/files/1/0432/2259/7796/files/lejoker.pdf
    • https://cdn.shopify.com/s/files/1/0438/2579/1133/files/viper_7752v_manual.pdf
    • https://cdn.shopify.com/s/files/1/0430/2936/4885/files/gmail_is_slow.pdf
    • https://cdn.shopify.com/s/files/1/0432/1348/8292/files/bibidaxel.pdf
    • https://cdn.shopify.com/s/files/1/0428/6762/2055/files/15126046364.pdf
    • https://cdn.shopify.com/s/files/1/0438/6937/2576/files/44638413218.pdf
    • https://cdn.shopify.com/s/files/1/0428/8688/9639/files/xexigipusiwitobejerakune.pdf
    • https://cdn.shopify.com/s/files/1/0433/7192/1571/files/59272132816.pdf
    • https://cdn.shopify.com/s/files/1/0432/5802/0004/files/noxazur.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000728c.bin
767409249683f2035a1c843aa75377496eb5d2ff712589a4f7a89ffd061983cf
pdf-font-stream PDF embedded font (sfnt) at offset 0x728C 5352 bytes
font_01_sfnt_off000084bb.bin
4c35e4965544c7dcf321637f5e4e794317adb8658028700e661eb58d49649f92
pdf-font-stream PDF embedded font (sfnt) at offset 0x84BB 13328 bytes
font_02_sfnt_off0000af8c.bin
b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c
pdf-font-stream PDF embedded font (sfnt) at offset 0xAF8C 4324 bytes