Malicious PDF — malware analysis report

Static analysis result for SHA-256 3d3e9949580b13a0…

MALICIOUS

PDF

40.5 KB Created: 2020-08-22 01:17:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a321d474c4ff90f624b823a7b83d8f17 SHA-1: a95a3506f261997c166f9fdd26f71bab83a7986a SHA-256: 3d3e9949580b13a0ca5ea059db426d926622ab2d202f1ab57750177da8f40b72
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains numerous embedded links, with a critical heuristic firing for a malicious redirector at `https://ttraff.ru/pify?keyword=pattern+astrology+app`. The document body, though heavily obfuscated, also contains this URL and references to an 'astrology app', suggesting a lure. The presence of a large number of external PDF links, many hosted on Shopify, indicates a link farm used to distribute the malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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=pattern+astrology+app
    • http://files.michaelcmarshall.com/uploads/1/3/0/7/130776828/16ff3fe8c.pdf
    • http://files.bluemaxautotint.com/uploads/1/3/2/8/132814589/xofiwitaxigik.pdf
    • http://files.btcjp.co/uploads/1/3/1/1/131164537/2738983.pdf
    • http://nodapa.charlesheiner.net/uploads/1/3/1/0/131070043/vukuboribadod.pdf
    • http://pazexebet.holmesroadchurch.org/uploads/1/3/1/4/131482976/dinodikeke.pdf
    • https://cdn.shopify.com/s/files/1/0432/2417/0659/files/anna_university_arrear_exam_time_table_for_regulation_2020.pdf
    • https://cdn.shopify.com/s/files/1/0431/9897/2066/files/40670970694.pdf
    • https://cdn.shopify.com/s/files/1/0441/0785/8072/files/6833874825.pdf
    • https://cdn.shopify.com/s/files/1/0432/1283/2931/files/61475109307.pdf
    • https://cdn.shopify.com/s/files/1/0431/6836/6746/files/nokosarelupadu.pdf
    • https://cdn.shopify.com/s/files/1/0428/6011/8175/files/19411242860.pdf
    • https://cdn.shopify.com/s/files/1/0432/5313/7576/files/kuxaxibupenofe.pdf
    • https://cdn.shopify.com/s/files/1/0429/2093/5590/files/cours_sur_la_loi_binomiale_1ere_s.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_off000061cc.bin
90d69507efc993520f4713edb854ee9ca10ccc47ad1183ada1de6687b606f41e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x61CC 5088 bytes
font_01_sfnt_off00007333.bin
c53dbd29382bc8d2a7cd2167ffaa17904983b84d30025131b2043bb88736e485		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7333 10184 bytes

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