Malicious PDF — malware analysis report

Static analysis result for SHA-256 513bc63bd4f1f4e3…

MALICIOUS

PDF

40.9 KB Created: 2020-08-20 03:41:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3b29ad73d1406dc8395685d84e6e174f SHA-1: 77617f643d6c6ff09cbecaeae1dafea5e9c49226 SHA-256: 513bc63bd4f1f4e3a625292b4cf6e04f818bdc24e206b5c50bd6712a83d4a3e3
120 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.cc/pify?keyword=autodesk+sketchbook+pro+apk+full+version'. Additionally, it exhibits characteristics of a PDF link farm, with numerous embedded links, many hosted on Shopify. The document body, though heavily obfuscated, also contains the primary malicious URL. This suggests the PDF is designed to redirect users to download potentially unwanted or malicious software.

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.cc/pify?keyword=autodesk+sketchbook+pro+apk+full+version
    • http://lunemif.on-demand-marketing.com/uploads/1/3/1/4/131482995/ada604637a481e.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/dogazuzotefoninu.pdf
    • https://cdn.shopify.com/s/files/1/0429/9037/0975/files/84829972914.pdf
    • https://cdn.shopify.com/s/files/1/0432/2807/0052/files/xuwikewen.pdf
    • https://cdn.shopify.com/s/files/1/0430/8657/7818/files/grade_4_math_word_problems_worksheets.pdf
    • https://cdn.shopify.com/s/files/1/0441/1087/2728/files/tipos_de_ecocardiograma.pdf
    • https://cdn.shopify.com/s/files/1/0433/3905/5253/files/mutinukojotuxebifozuwo.pdf
    • https://cdn.shopify.com/s/files/1/0437/4154/4600/files/toefl_sentence_structure_test.pdf
    • https://cdn.shopify.com/s/files/1/0428/1732/3175/files/basic_workout_at_home.pdf
    • https://cdn.shopify.com/s/files/1/0433/0638/5573/files/24352782215.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_off00005e88.bin
89493b5482385e9a9bc87506a11623b2b18c5cee062d919194c69bd97e1176e8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5E88 5496 bytes
font_01_sfnt_off00007136.bin
e0889fe651526be63b73ba73895ef11efb98a4503bf627f497efb036a872bd3e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7136 10944 bytes

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