Malicious PDF — malware analysis report

Static analysis result for SHA-256 1a1fff4f193b766b…

MALICIOUS

PDF

44.0 KB Created: 2020-08-02 09:19:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c1037f8abea838af2659d4d4e69cba89 SHA-1: f1bbd51a4c1a1f537166145a3aa5b9545f635253 SHA-256: 1a1fff4f193b766b5b94bbeeb82cf043ba9e68f5148f483927c31115ffa35585
150 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with a critical heuristic identifying a link to a known malicious redirector at 'https://ttraff.ru/pify?keyword=analytical+mechanics+fowles+pdf'. The document body, though heavily obfuscated, also contains this URL, suggesting the primary intent is to redirect the user to malicious infrastructure. The presence of numerous other links, many hosted on Shopify, indicates a link farm or SEO poisoning tactic to obscure the malicious destination. No scripts were extracted from this sample.

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=analytical+mechanics+fowles+pdf
    • http://files.capetowndaytours.net/uploads/1/3/0/8/130874629/bugob-bowon-jozopo-vudux.pdf
    • http://files.maltbyhilltop.com/uploads/1/3/1/4/131453633/248cab.pdf
    • http://files.readywritercsb.com/uploads/1/3/0/8/130874526/3019184.pdf
    • http://files.uxresearchandstrategy.com/uploads/1/3/2/6/132695212/8a76b2930a981b.pdf
    • https://cdn.shopify.com/s/files/1/0433/0258/4480/files/44275289103.pdf
    • https://cdn.shopify.com/s/files/1/0429/5049/2316/files/fameb.pdf
    • https://cdn.shopify.com/s/files/1/0430/8575/8628/files/7047823963.pdf
    • https://cdn.shopify.com/s/files/1/0433/4492/0734/files/33733773297.pdf
    • https://cdn.shopify.com/s/files/1/0428/8957/6601/files/neradilavi.pdf
    • https://cdn.shopify.com/s/files/1/0432/7142/2115/files/63733170875.pdf
    • https://cdn.shopify.com/s/files/1/0431/2560/4513/files/16164170346.pdf
    • https://cdn.shopify.com/s/files/1/0438/2598/7734/files/pufijamadususamanolozo.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/59022585862.pdf
    • https://cdn.shopify.com/s/files/1/0431/7334/7488/files/45961158026.pdf
    • https://cdn.shopify.com/s/files/1/0431/4346/3074/files/zadom.pdf
    • https://cdn.shopify.com/s/files/1/0431/5319/5165/files/69613572653.pdf
    • https://cdn.shopify.com/s/files/1/0431/8475/0747/files/64934754734.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_off00006528.bin
17eaffaa52646491fdffcd462aa75c29ddeea0cd0227f3f9ef86373d3cef1227
pdf-font-stream PDF embedded font (sfnt) at offset 0x6528 5480 bytes
font_01_sfnt_off000077c7.bin
6a5c3073b61727f0408abcbaec80bed1400189a2777616f69ad5e89743d40485
pdf-font-stream PDF embedded font (sfnt) at offset 0x77C7 13764 bytes