Malicious PDF — malware analysis report

Static analysis result for SHA-256 3939f94f6206ffef…

MALICIOUS

PDF

88.7 KB Created: 2020-07-25 20:12:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6a188fe4bc9a62a4bb0eb3453ee787fa SHA-1: 809128bb3caf27edcbba9041d35e3ef861eeaaab SHA-256: 3939f94f6206ffefb95d3fd97295ecb19a428093591477b5e6c415c6b2db355e
120 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'ttraff.ru'. Additionally, it exhibits a PDF link farm heuristic, with numerous links to PDFs hosted on Shopify. The embedded document body text is heavily obfuscated and appears to be junk data, offering no direct insight into the document's purpose. The primary attack vector appears to be the malicious redirector URL, which is likely used to lure users to a phishing or malware distribution site.

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=alistair+dragon+age+conversation+guide
    • http://files.counsellingpsychologist.services/uploads/1/3/0/9/130969555/7582248.pdf
    • http://files.controllerspages.com/uploads/1/3/0/8/130813851/841564.pdf
    • http://files.ionnibiru.com/uploads/1/3/1/1/131164479/efe35fa.pdf
    • https://cdn.shopify.com/s/files/1/0429/6006/0567/files/5132254419.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/46506788711.pdf
    • https://cdn.shopify.com/s/files/1/0428/6359/1583/files/58291197848.pdf
    • https://cdn.shopify.com/s/files/1/0429/2182/0313/files/97338234344.pdf
    • https://cdn.shopify.com/s/files/1/0439/9906/8310/files/29669495860.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/mutim.pdf
    • https://cdn.shopify.com/s/files/1/0431/2596/4957/files/wilodimide.pdf
    • https://cdn.shopify.com/s/files/1/0437/0500/8293/files/46790528644.pdf
    • https://cdn.shopify.com/s/files/1/0436/3550/7358/files/92492212929.pdf
    • https://cdn.shopify.com/s/files/1/0432/1335/7214/files/vilitabolepenimakukanoboz.pdf
    • https://cdn.shopify.com/s/files/1/0428/9236/1887/files/12221233920.pdf
    • https://cdn.shopify.com/s/files/1/0430/7386/3842/files/xexilum.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_off00012050.bin
7210e441854a6afab58a5f322d715437e9a54fa5c61ba6c70d859041b5cc06a7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12050 5036 bytes
font_01_sfnt_off00013176.bin
13b49704d06b9ef0002e82de44a3a61a977386f1715048686c6f6dfcbef945b0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13176 10496 bytes

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