Malicious PDF — malware analysis report

Static analysis result for SHA-256 1ab2b72ca45ded40…

MALICIOUS

PDF

54.8 KB Created: 2020-08-12 02:29:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a4f577d9c63cab2cef5c6b25a5b6c1d1 SHA-1: 4b52bf13a8c8a4121d3b47a41f469998faeb259c SHA-256: 1ab2b72ca45ded402a9687f1d600556bcb073f7234abe26b2fd88283e91b5935
150 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 ttraff.com. The document body, though partially corrupted, contains the same URL and a title suggesting a lure for a technical document. The PDF also exhibits characteristics of a link farm, with numerous embedded links to external PDFs, many hosted on cdn.shopify.com. The primary malicious URL is used to redirect users, likely to a phishing or malware distribution site.

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.com/pify?keyword=beginners+guide+to+solidworks+2020+level+1+pdf
    • http://jeraso.naturparkmaribo.dk/uploads/1/3/0/7/130775403/872d6f5a5793e0.pdf
    • http://peranali.njaje.org/uploads/1/3/0/8/130814328/f354bce3f.pdf
    • http://files.theparksphysie.com/uploads/1/3/2/6/132681156/loteniluva.pdf
    • https://cdn.shopify.com/s/files/1/0431/1734/6965/files/97924031526.pdf
    • https://cdn.shopify.com/s/files/1/0434/0783/5293/files/quantitative_aptitude_topics_list.pdf
    • https://cdn.shopify.com/s/files/1/0433/2853/6734/files/41075338252.pdf
    • https://cdn.shopify.com/s/files/1/0427/8996/1884/files/29608070504.pdf
    • https://cdn.shopify.com/s/files/1/0433/4003/8302/files/73917617698.pdf
    • https://cdn.shopify.com/s/files/1/0435/2226/1143/files/58380107676.pdf
    • https://cdn.shopify.com/s/files/1/0429/2119/7735/files/annual_report_sample_of_a_company.pdf
    • https://cdn.shopify.com/s/files/1/0430/0944/1953/files/guxufidifimugiruvifabaxaz.pdf
    • https://cdn.shopify.com/s/files/1/0428/1656/9500/files/59017701626.pdf
    • https://cdn.shopify.com/s/files/1/0447/0548/0858/files/12801476105.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_off00009750.bin
b747a42fd8742507897f5957e7146cb435ed5601cdc410538bf03a3814faaea1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9750 5588 bytes
font_01_sfnt_off0000aa91.bin
b03d217aba0cd65ef9c52c66f2349411cd004af7846b09ecab159e5a4e2b974b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAA91 10340 bytes

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