Malicious PDF — malware analysis report

Static analysis result for SHA-256 1a8adaa351df6492…

MALICIOUS

PDF

41.5 KB Created: 2020-08-15 04:00:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 675a3fe1c28c7ad7d96991901454c8c3 SHA-1: b397103a604908e00e60fa0c51d0d339f8ed725a SHA-256: 1a8adaa351df64925fc97b9ccc770108afef0373114995b9093042d4001e4c39
120 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to external resources, a technique often used for SEO poisoning or to redirect users to malicious sites. One critical heuristic firing indicates a direct link to known malicious redirector infrastructure at 'ttraff.com'. The document body, though heavily obfuscated, contains text related to a 'Cossacks 3 strategy guide', suggesting a lure to entice users to click the embedded links.

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=cossacks+3+strategy+guide
    • http://files.jamesmhatch.com/uploads/1/3/1/4/131409074/b1631d12e8d6.pdf
    • http://files.johnwilliamscounseling.com/uploads/1/3/1/1/131163643/3973768.pdf
    • http://tiguvo.notsuchsecretlife.com/uploads/1/3/1/4/131437079/4e6e077accf.pdf
    • http://xupemete.superioroutfitter.com/uploads/1/3/1/3/131384778/3720674.pdf
    • https://cdn.shopify.com/s/files/1/0432/7797/5717/files/bmi_calculator_excel_sheet.pdf
    • https://cdn.shopify.com/s/files/1/0431/4074/3330/files/bofeginodinejumifi.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/2283550224.pdf
    • https://cdn.shopify.com/s/files/1/0437/1031/6694/files/14468245186.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/kofuka.pdf
    • https://cdn.shopify.com/s/files/1/0432/4392/9757/files/artisan_roaster_scope.pdf
    • https://cdn.shopify.com/s/files/1/0429/7146/3831/files/35123369855.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/rofan.pdf
    • https://cdn.shopify.com/s/files/1/0439/1275/7400/files/amgen_logo.pdf
    • https://cdn.shopify.com/s/files/1/0438/2598/7734/files/arm_cortex_m4_instruction_set.pdf
    • https://cdn.shopify.com/s/files/1/0431/5293/3018/files/7610890258.pdf
    • https://cdn.shopify.com/s/files/1/0433/7952/3751/files/73340968294.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_off0000641f.bin
fede24148d88f036f2a1e683a57bbe130ec17bd3b8de865f0f6ec5c7bd9b7ebc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x641F 5312 bytes
font_01_sfnt_off0000763e.bin
73ed318dd11623285f5f1552b7d665dd127bbf5f2e106a93fbdf1d51f2ecba62		 pdf-font-stream PDF embedded font (sfnt) at offset 0x763E 10276 bytes

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