Malicious PDF — malware analysis report

Static analysis result for SHA-256 bb42d9cc4c2d42fb…

MALICIOUS

PDF

48.0 KB Created: 2020-08-08 14:01:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1e0c5675a6455a2d0d690a622ff8423c SHA-1: f530d196399aefae5175fc88a898ed5bef7a279c SHA-256: bb42d9cc4c2d42fb1885da3e873c63322438df5d6eee4c726dbb33954896703c
152 Risk Score

Malware Insights

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

The PDF contains a link farm designed to redirect users to malicious infrastructure, specifically identified by the 'PDF_MALICIOUS_REDIRECTOR_LINK' heuristic. The primary malicious URL is https://ttraff.com/pify?keyword=importance+of+essential+amino+acids+pdf, which is likely used to obscure the final destination. The document body, though heavily obfuscated, contains references to the topic and the malicious URL, reinforcing the lure.

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/pify?keyword=importance+of+essential+amino+acids+pdf
    • http://temebi.donardnswicklow.com/uploads/1/3/1/6/131637016/nanon.pdf
    • http://files.oakcreekfootball.com/uploads/1/3/1/4/131483662/xopafitedomajaxagafo.pdf
    • http://files.nativewomenscollective.org/uploads/1/3/2/6/132682235/9928571.pdf
    • http://files.sanjexseratti.com/uploads/1/3/1/4/131455328/6566755.pdf
    • http://files.mycolrd.com/uploads/1/3/1/4/131454850/3857654.pdf
    • https://cdn.shopify.com/s/files/1/0438/0616/3105/files/16_man_brackets.pdf
    • https://cdn.shopify.com/s/files/1/0431/9671/1069/files/48287286002.pdf
    • https://cdn.shopify.com/s/files/1/0432/6454/0835/files/xefexukizefelobifekuref.pdf
    • https://cdn.shopify.com/s/files/1/0431/0056/9751/files/simple_personal_budget_template.pdf
    • https://cdn.shopify.com/s/files/1/0428/0179/1132/files/furoferupixivegujeburiliv.pdf
    • https://cdn.shopify.com/s/files/1/0432/2567/7982/files/fobamaf.pdf
    • https://cdn.shopify.com/s/files/1/0431/2426/1026/files/38237987225.pdf
    • https://cdn.shopify.com/s/files/1/0432/3636/0351/files/zisoled.pdf
    • https://cdn.shopify.com/s/files/1/0434/6406/5188/files/fonipexazuvijitum.pdf
    • https://cdn.shopify.com/s/files/1/0433/5301/4427/files/beviwosiwivore.pdf
    • https://cdn.shopify.com/s/files/1/0435/4749/2506/files/16608775103.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_off00007f3f.bin
653aa055ffd61de72a233c922940ecb6e737fe5d141cc642a14b424f855c56f0
pdf-font-stream PDF embedded font (sfnt) at offset 0x7F3F 5236 bytes
font_01_sfnt_off000090f1.bin
8263c1e07cab2113d4d07fb844bc8e5bb1f09095f22545c2817ef6093052ec42
pdf-font-stream PDF embedded font (sfnt) at offset 0x90F1 9908 bytes