Malicious PDF — malware analysis report

Static analysis result for SHA-256 60c1e866bb5a3869…

MALICIOUS

PDF

43.9 KB Created: 2020-08-02 08:01:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e5724eaf2a1764bad30efc7df08f7070 SHA-1: e55bf43c0312e36b143b7274ac80ffc3a333f7d1 SHA-256: 60c1e866bb5a38695709aff3d0c409480ed14398e72a78cd34f8a792d4a59f59
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a link farm with numerous links to external PDF files, many hosted on Shopify. One of the primary links, 'https://ttraff.ru/pify?keyword=migos+one+time+audiomack', is flagged as a malicious redirector. This suggests the document is part of a link-based attack, potentially for SEO poisoning or phishing, aiming to redirect users to malicious sites. No scripts were extracted, but the presence of embedded URLs and the malicious redirector link strongly indicate malicious intent.

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=migos+one+time+audiomack
    • http://files.stjosephfortjennings.org/uploads/1/3/0/7/130739747/7448140.pdf
    • http://files.coragulachouse.com/uploads/1/3/0/9/130969075/66dff1.pdf
    • http://files.phoenixarts.net/uploads/1/3/0/9/130969498/823f05acafe6cff.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/9751/3381/files/perofamojixirokelaguted.pdf
    • https://cdn.shopify.com/s/files/1/0432/4130/8320/files/keritugonu.pdf
    • https://cdn.shopify.com/s/files/1/0440/4045/4294/files/6810488364.pdf
    • https://cdn.shopify.com/s/files/1/0428/7194/7423/files/xuwiwevogewitiw.pdf
    • https://cdn.shopify.com/s/files/1/0432/0195/3952/files/46110497629.pdf
    • https://cdn.shopify.com/s/files/1/0432/2417/0664/files/62326397470.pdf
    • https://cdn.shopify.com/s/files/1/0431/1243/1770/files/49264412324.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/winoxilerudizixadejugo.pdf
    • https://cdn.shopify.com/s/files/1/0432/2931/5229/files/how_to_make_a_ringtone_for_iphone.pdf
    • https://cdn.shopify.com/s/files/1/0432/9547/3822/files/99457084134.pdf
    • https://cdn.shopify.com/s/files/1/0438/2405/4429/files/42332884990.pdf
    • https://cdn.shopify.com/s/files/1/0433/9597/3276/files/20917100912.pdf
    • https://cdn.shopify.com/s/files/1/0431/2806/2103/files/rotimemetubemiritaginup.pdf
    • https://cdn.shopify.com/s/files/1/0428/1306/3335/files/95591832823.pdf
    • https://cdn.shopify.com/s/files/1/0429/5173/7498/files/xojud.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006d80.bin
d6e88e3232d437bbb0341c52699d4e6294654c75de2c17b12429329606940933		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6D80 5200 bytes
font_01_sfnt_off00007f30.bin
ad21035440e450f40db2143c34614020f384d22cb792caa3b39b3b4568c60e53		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7F30 10240 bytes

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