Malicious PDF — malware analysis report

Static analysis result for SHA-256 afdf9048ba369378…

MALICIOUS

PDF

60.2 KB Created: 2020-08-19 07:38:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2845b8a82a28e55c60f32e212779bca4 SHA-1: 7896fe3d0e58a075e34b4f7c86566fd7a2a8937b SHA-256: afdf9048ba369378bc9a61cc7450e8e9e6c7b8b215336cfcd2c817091c96ed13
154 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for PDF_MALICIOUS_REDIRECTOR_LINK, indicating it points to malicious infrastructure. Additionally, PDF_SEO_LINK_FARM suggests a large number of external links, likely for SEO manipulation or to host further malicious content. The embedded URL 'https://ttraff.ru/pify?keyword=north+direction+compass' is identified as a malicious redirector. The document body, though heavily obfuscated, contains this URL, reinforcing the malicious intent.

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=north+direction+compass
    • http://files.cmisafes.com/uploads/1/3/0/7/130739544/tedanazax.pdf
    • https://cdn.shopify.com/s/files/1/0437/7539/3946/files/low_back_exercises_nhs.pdf
    • https://cdn.shopify.com/s/files/1/0447/3955/9578/files/dolch_sight_words_list.pdf
    • https://cdn.shopify.com/s/files/1/0431/2642/3708/files/practical_english_usage_book_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0429/0176/6310/files/80958557353.pdf
    • https://cdn.shopify.com/s/files/1/0437/4790/1592/files/mijoputugatiw.pdf
    • https://cdn.shopify.com/s/files/1/0430/7612/4821/files/1707860172.pdf
    • https://cdn.shopify.com/s/files/1/0433/2758/6472/files/dubepavop.pdf
    • https://cdn.shopify.com/s/files/1/0444/3848/7206/files/ashrae_handbook_fundamentals.pdf
    • https://cdn.shopify.com/s/files/1/0428/9714/6019/files/18158309652.pdf
    • https://cdn.shopify.com/s/files/1/0451/1091/9321/files/bretagne_map.pdf
    • https://cdn.shopify.com/s/files/1/0430/4325/8519/files/nukagadokipofeb.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_off0000a1de.bin
c5bb835b1292e2668bd7e393a5f785e89c35f70a8e5a3e70acc6a7cb76ca5f21
pdf-font-stream PDF embedded font (sfnt) at offset 0xA1DE 3440 bytes
font_01_sfnt_off0000ae12.bin
c096b674e3dae46745b74b0433afa9b1345f6b43a6920534855e8261d7fa75d1
pdf-font-stream PDF embedded font (sfnt) at offset 0xAE12 5252 bytes
font_02_sfnt_off0000bfc1.bin
8f1c69de2e9f7d01910d497755273e880369bc1ef0801e81f89c2b40cfaf1f9c
pdf-font-stream PDF embedded font (sfnt) at offset 0xBFC1 10796 bytes