Malicious PDF — malware analysis report

Static analysis result for SHA-256 b8afd6496b071add…

MALICIOUS

PDF

47.1 KB Created: 2020-08-07 15:39:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 332d36a9a4ee5178c338e517bda552cd SHA-1: cbb6aea70927cdb6123171ba03865901689b5bf6 SHA-256: b8afd6496b071adda5378b5c1ae127f4c617067abc07d80934de17e87b467c10
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a large number of embedded links, many of which point to a link farm hosted on Shopify. One of these links redirects to a malicious infrastructure at 'ttraff.ru'. The ML classifier also strongly indicated maliciousness. The document body, though partially corrupted, contains text related to 'energia eolica' and the wkhtmltopdf application, suggesting a lure for a specific topic to encourage clicks.

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=energia+eolica+ventajas+y+desventajas+pdf
    • http://files.kimberlystories.org/uploads/1/3/1/4/131409677/pasenaj.pdf
    • http://files.lilybrazdesign.com/uploads/1/3/0/7/130775970/2704ebe0f3.pdf
    • http://files.naramataartstudios.com/uploads/1/3/0/7/130739415/poroga.pdf
    • http://files.robertanpictures.com/uploads/1/3/2/8/132814138/zemanikoj_nizokukiza.pdf
    • https://cdn.shopify.com/s/files/1/0428/4694/5436/files/lafajep.pdf
    • https://cdn.shopify.com/s/files/1/0433/2896/2715/files/wepadanafanufojon.pdf
    • https://cdn.shopify.com/s/files/1/0430/3893/3146/files/moros.pdf
    • https://cdn.shopify.com/s/files/1/0429/8316/2019/files/minecraft_ps3_adventure_maps_downloads.pdf
    • https://cdn.shopify.com/s/files/1/0428/5893/8531/files/blockchain_technology_architecture.pdf
    • https://cdn.shopify.com/s/files/1/0433/9240/1573/files/45362948824.pdf
    • https://cdn.shopify.com/s/files/1/0432/0926/1217/files/gta_san_andreas_cheat_codes_download_in_english.pdf
    • https://cdn.shopify.com/s/files/1/0435/6279/5171/files/padotaxeli.pdf
    • https://cdn.shopify.com/s/files/1/0432/3603/2680/files/vumafetexogolotapapa.pdf
    • https://cdn.shopify.com/s/files/1/0440/8151/2613/files/82379130665.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_off00006a73.bin
9b1d39a53f76c6ca34b6812b47bf9927e26226181d53dbedbb3ce42939d1d136
pdf-font-stream PDF embedded font (sfnt) at offset 0x6A73 5308 bytes
font_01_sfnt_off00007c9c.bin
8f17682a7dba440cc0a2890f3ff4cc06b8d76d52594e22fafab66f394febcd12
pdf-font-stream PDF embedded font (sfnt) at offset 0x7C9C 10696 bytes
font_02_sfnt_off00009f42.bin
1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e
pdf-font-stream PDF embedded font (sfnt) at offset 0x9F42 4324 bytes