Malicious PDF — malware analysis report

Static analysis result for SHA-256 9d1385bedfb7628d…

MALICIOUS

PDF

38.6 KB Created: 2020-08-07 10:12:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 25f401e88a2ed786ea4cc6eaf8982ed9 SHA-1: 98db1458dfb34f6a4092ef3abbc60f4e389c35d0 SHA-256: 9d1385bedfb7628d296ef066c67c6a0511a72d5cb666fa33bb5a79cc2b1ecf2f
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.com'. The document body, though heavily obfuscated, contains this URL and other Shopify links, suggesting a link farm or lure. The ML classifier also strongly flagged this PDF as malicious. The primary attack pattern involves redirecting the user to malicious infrastructure via the embedded link.

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=boeing+737ng+cockpit+companion+pdf
    • http://files.coaching-planet.com/uploads/1/3/2/8/132814276/lebumujajofo-dewitupekaja-mozofaw.pdf
    • http://files.jessiesfitclub.com/uploads/1/3/2/7/132741556/wamezo_segana.pdf
    • http://tadazi.mcglynnlab.com/uploads/1/3/1/4/131453109/jugeniwerobekup.pdf
    • https://cdn.shopify.com/s/files/1/0434/0911/3253/files/peter_pan.pdf
    • https://cdn.shopify.com/s/files/1/0434/5308/7909/files/united_states_zip.pdf
    • https://cdn.shopify.com/s/files/1/0433/0110/9920/files/jibumexibovimexezeni.pdf
    • https://cdn.shopify.com/s/files/1/0437/6212/2903/files/disetivazusuwazogapukepuw.pdf
    • https://cdn.shopify.com/s/files/1/0433/4980/3166/files/juvarakozolawagor.pdf
    • https://cdn.shopify.com/s/files/1/0436/5529/9237/files/ccna_200_301_book_download.pdf
    • https://cdn.shopify.com/s/files/1/0431/6761/3089/files/76303543404.pdf
    • https://cdn.shopify.com/s/files/1/0432/5533/3027/files/99039913135.pdf
    • https://cdn.shopify.com/s/files/1/0429/8267/0485/files/rojegofexusupafufufajabu.pdf
    • https://cdn.shopify.com/s/files/1/0429/6946/4991/files/game_of_thrones_death_pool.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_off000057ed.bin
eaa06372129e5312d0d450524346e6f47d5ec0cadcd356b53bf09549730e4cb7
pdf-font-stream PDF embedded font (sfnt) at offset 0x57ED 5528 bytes
font_01_sfnt_off00006acb.bin
c9e2906e71a8e89ffd601704347d931bdf09c6e9438b970899381f274da6ad94
pdf-font-stream PDF embedded font (sfnt) at offset 0x6ACB 10196 bytes