Malicious PDF — malware analysis report

Static analysis result for SHA-256 b08c78020d6e8701…

MALICIOUS

PDF

67.4 KB Created: 2020-08-14 06:09:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0488ccf6d01bfa96e99f92ee666b2664 SHA-1: 28b2081d7dc0f1bdeff20bae77334c900460ca47 SHA-256: b08c78020d6e87012b4db1747c18116ed8a84babcc271aa484d0d6e19147b3ce
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 'https://ttraff.com/pify?keyword=debate+competition+news+report'. Additionally, it exhibits characteristics of a PDF link farm, with numerous embedded URLs, many hosted on Shopify. The ML classifier strongly supports the malicious nature of this PDF. The document body appears to be corrupted or obfuscated, but the presence of the malicious URL is sufficient to infer a phishing or malware distribution attempt.

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=debate+competition+news+report
    • http://files.viptowingcorp.com/uploads/1/3/0/8/130813314/9f3265b.pdf
    • http://files.creativationevents.com/uploads/1/3/1/8/131856772/1290035.pdf
    • http://vosixalo.kathyshealthyliving.com/uploads/1/3/1/6/131636727/1996141.pdf
    • http://files.crookedriveroffroad.com/uploads/1/3/0/9/130969831/1801018.pdf
    • http://files.nataliekimballfitness.com/uploads/1/3/2/8/132814826/2e0c8e3a2c3.pdf
    • https://cdn.shopify.com/s/files/1/0434/9476/8792/files/66153043734.pdf
    • https://cdn.shopify.com/s/files/1/0437/3171/4202/files/kisabopimewavofipofiv.pdf
    • https://cdn.shopify.com/s/files/1/0430/0223/2983/files/21602226592.pdf
    • https://cdn.shopify.com/s/files/1/0428/5107/4214/files/bunixugugixof.pdf
    • https://cdn.shopify.com/s/files/1/0429/3269/9292/files/40123625096.pdf
    • https://cdn.shopify.com/s/files/1/0428/0533/0083/files/tanotolujonufidotaliwe.pdf
    • https://cdn.shopify.com/s/files/1/0432/1532/3291/files/nesasolorinarinuj.pdf
    • https://cdn.shopify.com/s/files/1/0439/3995/4856/files/common_sense_thomas_paine_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0429/9977/5381/files/werasek.pdf
    • https://cdn.shopify.com/s/files/1/0437/3427/0101/files/65968588259.pdf
    • https://cdn.shopify.com/s/files/1/0431/7957/3414/files/52103752678.pdf
    • https://cdn.shopify.com/s/files/1/0428/9282/0643/files/download_software_to_word_untuk_pc.pdf
    • https://cdn.shopify.com/s/files/1/0433/5733/9799/files/50057533892.pdf
    • https://cdn.shopify.com/s/files/1/0432/6142/7867/files/6925497366.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_off0000ca77.bin
2c55aed06aa9ea374975645b85e5fcaf531bea2088c4ee3e2e4f2a38f4ae8eea
pdf-font-stream PDF embedded font (sfnt) at offset 0xCA77 5280 bytes
font_01_sfnt_off0000dc5f.bin
cb986739924474070db7613c1ae96ac61b7c8bc48dd615e21551074a919d9f5d
pdf-font-stream PDF embedded font (sfnt) at offset 0xDC5F 10616 bytes