Malicious PDF — malware analysis report

Static analysis result for SHA-256 394a350da955e9c6…

MALICIOUS

PDF

40.5 KB Created: 2020-07-12 11:27:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: eb16df27927ba6a4ed2352c4ed303f50 SHA-1: b113c38839337b5dc26054412a4b5dab52d47dae SHA-256: 394a350da955e9c60fb9bdcf28c55e762faabdef00acb956fe9572cce9661c69
154 Risk Score

Malware Insights

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

The PDF contains a link farm and a redirector to a malicious URL, indicating a phishing or scam attempt. The primary malicious URL identified is https://ttraff.com/pify?keyword=master+key+system+pdf. The document body and embedded links suggest a lure related to a "master key system" to entice users to click through to the malicious site. No scripts were extracted, limiting the analysis of further payload delivery.

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.com/pify?keyword=master+key+system+pdf
    • http://files.yizhixu.com/uploads/1/3/1/3/131398102/fisenizadak_redafex_mitutalojejid.pdf
    • http://files.electricimpulsecloggers.com/uploads/1/3/2/6/132681296/tiruzijirataxinodu.pdf
    • http://files.thecrankfiles.com/uploads/1/3/1/4/131454172/1f8ca.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/danedogorolulefumatexa.pdf
    • https://cdn.shopify.com/s/files/1/0431/4995/1138/files/46891623657.pdf
    • https://cdn.shopify.com/s/files/1/0427/9477/8791/files/17431057710.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/58657968950.pdf
    • https://nopozofura.files.wordpress.com/2020/07/24402004312.pdf
    • https://guzedaf.files.wordpress.com/2020/06/disokazalew.pdf
    • https://jogapodu.files.wordpress.com/2020/06/58304244085.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/96280370261.pdf
    • https://cdn.shopify.com/s/files/1/0429/5085/2762/files/17142138142.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/gasowezigubufavowi.pdf
    • https://cdn.shopify.com/s/files/1/0428/5746/3971/files/xodesajijewiti.pdf
    • https://cdn.shopify.com/s/files/1/0431/2370/3970/files/vidigunilaw.pdf
    • https://cdn.shopify.com/s/files/1/0427/4287/4278/files/vevogeziregiseganezum.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/51191810805.pdf
    • https://cdn.shopify.com/s/files/1/0431/1102/2756/files/60264080122.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_off000061eb.bin
c8a69eeabe41368780d975d9bbc008ce1b147866097675bbd2a5b8295847d646		 pdf-font-stream PDF embedded font (sfnt) at offset 0x61EB 4852 bytes
font_01_sfnt_off00007274.bin
c1f8579c2559ce5281e3a130bd4443daba9ad014c6595df4a4e63b28463592c6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7274 10240 bytes

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