Malicious PDF — malware analysis report

Static analysis result for SHA-256 69a0b6d85ae473ed…

MALICIOUS

PDF

41.9 KB Created: 2020-08-22 16:21:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 90434e1ae8fa349799454060f63f795d SHA-1: a3c9fb8d1f7b0b79860dbf0ff8adaec97534ed02 SHA-256: 69a0b6d85ae473ed4d43db62a937fbc7aa1d9c6f2f38c0c32b45b39a69381c4b
154 Risk Score

Malware Insights

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

The PDF contains embedded links, with one critical heuristic identifying it as a redirector link pointing to 'https://ttraff.ru/pify?keyword=daily+budget+planner+excel+template'. Another heuristic flags it as a PDF link farm, indicating a large number of external links. The document body, though heavily obfuscated, also contains the same redirector URL, suggesting the primary purpose is to drive traffic to malicious infrastructure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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=daily+budget+planner+excel+template
    • http://files.lewisandclarkriverboat.net/uploads/1/3/2/6/132681513/genadipixesuwuvipuzo.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0432/5516/9182/files/telugu_panchangam_2015.pdf
    • https://cdn.shopify.com/s/files/1/0431/5096/6950/files/96276030345.pdf
    • https://cdn.shopify.com/s/files/1/0428/0510/0707/files/77387555653.pdf
    • https://cdn.shopify.com/s/files/1/0440/0631/0046/files/17803817098.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/9284441163.pdf?v=1594212706
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/66456909559.pdf
    • https://cdn.shopify.com/s/files/1/0432/6490/1284/files/najolipulemazodu.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000662d.bin
8cf4c897e618116a42eca07747f2ea5c72b76ef3b9dd4f4790f394eadd187a50		 pdf-font-stream PDF embedded font (sfnt) at offset 0x662D 5524 bytes
font_01_sfnt_off000078db.bin
aff2784b22788fa30c49a7066e30891aa206cb7ebbab99af85aab02306713088		 pdf-font-stream PDF embedded font (sfnt) at offset 0x78DB 9948 bytes

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