Malicious PDF — malware analysis report

Static analysis result for SHA-256 ba76d29a27a43af3…

MALICIOUS

PDF

43.7 KB Created: 2020-08-12 14:27:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 00947a4a48b7c5ae0ed03979c79497bf SHA-1: 563cd58431b56638557e3e8bac831fe8d19d5f1b SHA-256: ba76d29a27a43af322433ad99a1e9ff144c33299af5a9fa9e10de484111667ae
150 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to external PDFs hosted on Shopify. One of the primary links, https://ttraff.ru/pify?keyword=venice+map+attractions+pdf, is identified as a malicious redirector. The document body, though heavily obfuscated, contains references to Venice map attractions and the wkhtmltopdf tool, suggesting a lure to disguise malicious redirection. The ML classifier also strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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=venice+map+attractions+pdf
    • http://files.rockypointboatdock.com/uploads/1/3/1/8/131871480/pijoramozaniguf.pdf
    • http://jukobur.sciencehillbaseball.com/uploads/1/3/0/8/130874429/ruvix_zovizuza_dimuxexitase_wovivi.pdf
    • http://files.suphanahong.com/uploads/1/3/1/4/131437149/32310b5d71e8.pdf
    • http://gurudot.emilyreynoldsart.com/uploads/1/3/1/6/131636612/neguvazuwur.pdf
    • http://files.danikristich.com/uploads/1/3/1/8/131856347/wujusaririlulase.pdf
    • https://cdn.shopify.com/s/files/1/0430/6924/3553/files/zanuzofoxax.pdf
    • https://cdn.shopify.com/s/files/1/0429/2762/0249/files/gradle_tutorial.pdf
    • https://cdn.shopify.com/s/files/1/0432/5795/4464/files/zapovasanununofol.pdf
    • https://cdn.shopify.com/s/files/1/0429/5213/0716/files/arrivederci_roma_sheet_music.pdf
    • https://cdn.shopify.com/s/files/1/0437/5661/7877/files/60584677892.pdf
    • https://cdn.shopify.com/s/files/1/0432/2813/5591/files/learn_python_tutorials_point.pdf
    • https://cdn.shopify.com/s/files/1/0432/4291/3952/files/terimemozizo.pdf
    • https://cdn.shopify.com/s/files/1/0433/6982/4414/files/69256614766.pdf
    • https://cdn.shopify.com/s/files/1/0428/8918/3398/files/mazuzagulijowa.pdf
    • https://cdn.shopify.com/s/files/1/0430/1901/0201/files/22545151167.pdf
    • https://cdn.shopify.com/s/files/1/0431/7931/1253/files/ripibizamukezo.pdf
    • https://cdn.shopify.com/s/files/1/0446/8133/0841/files/postman_api_documentation.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_off00006e3f.bin
5c7e35d48e5828f8db9ee7325001dee012821389d472125e11183f83742da9a3
pdf-font-stream PDF embedded font (sfnt) at offset 0x6E3F 5236 bytes
font_01_sfnt_off00007fe9.bin
ad7e99d699d8eefb2d8fc6c40971270a56833c8bb8ff64d8a82bcb056cc52ad2
pdf-font-stream PDF embedded font (sfnt) at offset 0x7FE9 9992 bytes