Malicious PDF — malware analysis report

Static analysis result for SHA-256 fce92247e9183f2d…

MALICIOUS

PDF

74.9 KB Created: 2020-08-19 06:51:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 220d72ffd86d507c6d88454773aa9508 SHA-1: 5976203e9c94bf9be0f5fbbce763a0ec98528c5f SHA-256: fce92247e9183f2d079356a9e2e05b3be08158033cf99417f188fed03ca4259a
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 'https://ttraff.cc/pify?keyword=isometric+view+drawing+pdf'. This URL is embedded within the document body, suggesting a social engineering lure. The ML classifier also strongly flagged this PDF as malicious. The document body itself is heavily obfuscated but contains the malicious URL, reinforcing the attack pattern.

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.cc/pify?keyword=isometric+view+drawing+pdf
    • http://files.mutouchfootball.com/uploads/1/3/0/7/130775868/dofutoreruv.pdf
    • https://cdn.shopify.com/s/files/1/0437/1628/0469/files/reading_piano_sheet_music_quiz.pdf
    • https://cdn.shopify.com/s/files/1/0440/6099/9830/files/29142937382.pdf
    • https://cdn.shopify.com/s/files/1/0428/5802/1027/files/alta_trail_map.pdf
    • https://cdn.shopify.com/s/files/1/0431/0702/5056/files/kakiz.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/dedepisolutiri.pdf
    • https://cdn.shopify.com/s/files/1/0435/2029/5064/files/list_of_architects_in_hyderabad.pdf
    • https://cdn.shopify.com/s/files/1/0433/7877/0076/files/ligodofu.pdf
    • https://cdn.shopify.com/s/files/1/0431/0489/5143/files/basics_of_chess.pdf
    • https://cdn.shopify.com/s/files/1/0433/9354/8444/files/zinozimelemodarumex.pdf
    • https://cdn.shopify.com/s/files/1/0433/0989/1742/files/belur.pdf
    • https://cdn.shopify.com/s/files/1/0435/1026/8068/files/93204098497.pdf
    • https://cdn.shopify.com/s/files/1/0429/2942/2499/files/71315994071.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_off0000c241.bin
528b9dca86f19ed29ce82ed0475660f6749e22bb1d42506694d5cc915951a96b
pdf-font-stream PDF embedded font (sfnt) at offset 0xC241 5532 bytes
font_01_sfnt_off0000d511.bin
ba01dbe6314fb70d172f9def454b3bea7f829739fee68e650d5f88c4e1b1a8cb
pdf-font-stream PDF embedded font (sfnt) at offset 0xD511 16476 bytes
font_02_sfnt_off000108fe.bin
cef1306c1b6746bffbf0ae4a07acf64f6423063490346ee8771aa2010c975ceb
pdf-font-stream PDF embedded font (sfnt) at offset 0x108FE 16152 bytes