Malicious PDF — malware analysis report

Static analysis result for SHA-256 f8b75af566572860…

MALICIOUS

PDF

43.6 KB Created: 2020-08-24 07:13:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 05682c3c40751888de170c5cc33742e2 SHA-1: 2855194afb8d0b6a876ab10740f3bcda6041f6af SHA-256: f8b75af566572860612393a446f4de54c61d8500f533185432eb2a74644251b5
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'. Additionally, it features a PDF link farm, with one of the initial links also pointing to 'ttraff.com'. The document body, though heavily obfuscated, contains text fragments and a URL that align with a phishing or redirection attempt. The ML classifier also strongly indicated maliciousness.

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=best+android+phone+2019+at%2526+t
    • http://files.epmclarity.com/uploads/1/3/1/3/131398143/9cafca.pdf
    • http://files.stainlesssteelfabricators.net/uploads/1/3/1/4/131438202/vugizimew-lujapazikotixu-lapizanuxe-xisakibur.pdf
    • http://files.ddespta.com/uploads/1/3/0/8/130814411/dojivikifuk-sarafubokat-lobezet.pdf
    • https://cdn.shopify.com/s/files/1/0428/7240/6179/files/7367465451.pdf
    • https://cdn.shopify.com/s/files/1/0431/4388/9057/files/zilob.pdf
    • https://cdn.shopify.com/s/files/1/0431/0505/8976/files/toro_421_snowblower.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/19194700937.pdf
    • https://cdn.shopify.com/s/files/1/0429/9925/1097/files/darksiders_2_cheats.pdf
    • https://cdn.shopify.com/s/files/1/0428/2161/5772/files/60973025700.pdf
    • https://cdn.shopify.com/s/files/1/0430/7222/5442/files/nerasudelemudijuloxejanuv.pdf
    • https://cdn.shopify.com/s/files/1/0430/5348/2138/files/79844537089.pdf
    • https://cdn.shopify.com/s/files/1/0462/2601/4362/files/72484110575.pdf
    • https://cdn.shopify.com/s/files/1/0430/3945/7431/files/statistical_quality_control_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0437/4737/7301/files/questions_on_algorithms_and_flowcharts.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/bixebor.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/
    • https://cdn.shopify.com/s/files/1/0430/3945/7431/fil

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006b38.bin
1fd2602d9df3b59d93640e607ba7c1a4ea74e12b05c941471db6809768b1d585		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6B38 5548 bytes
font_01_sfnt_off00007e06.bin
d7175196cd55dbb5e9b222536685736595c4d2f9b46bcf7022a40c112a8aa30b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7E06 10300 bytes

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