Malicious PDF — malware analysis report

Static analysis result for SHA-256 32222ea0baa89649…

MALICIOUS

PDF

48.1 KB Created: 2020-08-21 15:44:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1ccfd5b6cc1e47543dd56c9cdd7be514 SHA-1: 573fdb3616e7893821858ef8eb7136ac31d858fb SHA-256: 32222ea0baa896491c30f61718bda7f342d7f2e14fbe910116a71a2a0994895c
154 Risk Score

Malware Insights

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

The PDF was flagged as malicious due to a large number of embedded links, including one pointing to a known malicious redirector. The document body, though heavily obfuscated, contains URLs that are likely part of a link farm designed to lure users to malicious sites. The primary malicious URL identified is https://ttraff.ru/pify?keyword=compiler+report+errors.

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=compiler+report+errors
    • http://mejujopax.wearemindmade.com/uploads/1/3/1/6/131637136/9093340.pdf
    • http://riraro.southerncyclecoaching.com/uploads/1/3/1/4/131437308/4859ea430e6cc77.pdf
    • https://cdn.shopify.com/s/files/1/0429/8535/7463/files/whatsapp_aero_versi_7._92.pdf
    • https://cdn.shopify.com/s/files/1/0431/1855/9389/files/32965695856.pdf
    • https://cdn.shopify.com/s/files/1/0435/5103/1447/files/64661780337.pdf
    • https://cdn.shopify.com/s/files/1/0445/4963/6255/files/barbarismes_valencians.pdf
    • https://cdn.shopify.com/s/files/1/0428/7696/0924/files/fesitix.pdf
    • https://cdn.shopify.com/s/files/1/0428/5975/7734/files/bodhidharma_tamil_movie.pdf
    • https://cdn.shopify.com/s/files/1/0435/9972/4702/files/87632967201.pdf
    • https://cdn.shopify.com/s/files/1/0430/8297/3346/files/57725360312.pdf
    • https://cdn.shopify.com/s/files/1/0438/2290/7554/files/dapelobizepovizufulu.pdf
    • https://cdn.shopify.com/s/files/1/0430/6858/8194/files/lezezulubimosal.pdf
    • https://cdn.shopify.com/s/files/1/0433/3083/0494/files/autocad_lt_2014_sp1.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_off00008164.bin
75cfff342ba7db64739842635d4aba78e7306b668bc9e6aa2fd9daf00f743bcf
pdf-font-stream PDF embedded font (sfnt) at offset 0x8164 4660 bytes
font_01_sfnt_off00009124.bin
c82a8e16efb6f4628a388d9159ff136ef555c7e0f547460e5cdf76959cd5d9fb
pdf-font-stream PDF embedded font (sfnt) at offset 0x9124 10272 bytes