Malicious PDF — malware analysis report

Static analysis result for SHA-256 8a7bab79ac180943…

MALICIOUS

PDF

62.2 KB Created: 2020-08-18 13:13:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e58ad9f176795703a95cb6987fa148b4 SHA-1: 5193f3b3604401685202f10ac3f25992605d2ff2 SHA-256: 8a7bab79ac180943a959aea814a046bd0bdb487a4c623801f20d6b05eaaff44b
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Phishing: Spearphishing Attachment T1059.001 Command and Scripting Interpreter: PowerShell

This PDF file exhibits malicious behavior by containing a large number of external links, many pointing to Shopify-hosted PDFs, indicative of a link farm or SEO manipulation tactic. One critical heuristic identified a link to known malicious redirector infrastructure at 'https://ttraff.ru/pify?keyword=behen+hogi+teri+song++pagal'. The ML classifier strongly flagged this PDF as malicious. The presence of numerous links suggests an attempt to distribute further malicious content or engage in phishing-like activities.

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=behen+hogi+teri+song++pagal
    • http://files.sxjlifts.com/uploads/1/3/0/7/130775016/xivomigumitap.pdf
    • https://cdn.shopify.com/s/files/1/0435/1967/2472/files/14204388264.pdf
    • https://cdn.shopify.com/s/files/1/0430/3503/3757/files/69564490299.pdf
    • https://cdn.shopify.com/s/files/1/0435/3864/5144/files/kapejo.pdf
    • https://cdn.shopify.com/s/files/1/0435/3484/4059/files/72199853196.pdf
    • https://cdn.shopify.com/s/files/1/0427/9946/4611/files/44011207190.pdf
    • https://cdn.shopify.com/s/files/1/0428/3590/2631/files/35985936578.pdf
    • https://cdn.shopify.com/s/files/1/0447/9136/5792/files/captivated_book.pdf
    • https://cdn.shopify.com/s/files/1/0447/9251/2678/files/anemia_microcitica_pediatria.pdf
    • https://cdn.shopify.com/s/files/1/0433/1916/5086/files/80283446537.pdf
    • https://cdn.shopify.com/s/files/1/0431/7629/6614/files/33525431836.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_off0000976a.bin
96d207f94f28db767f4d309b6ef15fad43577d540fbc7d1e3cff7b747c1c8548
pdf-font-stream PDF embedded font (sfnt) at offset 0x976A 5128 bytes
font_01_sfnt_off0000a8d6.bin
f6adc7374ae3a5ec017d2ff58a34ae4620044d61575b30e124778d07b6fb3cf4
pdf-font-stream PDF embedded font (sfnt) at offset 0xA8D6 14752 bytes
font_02_sfnt_off0000d702.bin
e296a61d2d303e35be9e1a35631556663d2780498efa7e8f3867bf557f172fe6
pdf-font-stream PDF embedded font (sfnt) at offset 0xD702 16164 bytes