Malicious PDF — malware analysis report

Static analysis result for SHA-256 b337efbaea843093…

MALICIOUS

PDF

42.1 KB Created: 2020-09-17 00:27:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0054df4a9fd3435937e58abf8f34683f SHA-1: a58026d4d9065f478a754200eb27cf6de652a42d SHA-256: b337efbaea843093b146d65c89af8c8e6a79fcb18065e471304c210dba25c0e0
128 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing for a malicious redirector link, pointing to 'https://ttraff.ru/wix?keyword=dead+effect+2+apk+mod+mega'. Additionally, it exhibits characteristics of a PDF link farm, with numerous embedded links, many of which are to Shopify-hosted PDFs. The document body, though heavily obfuscated, contains the same malicious URL and a benign-looking PDF link, suggesting a lure to download potentially unwanted or malicious content. The presence of a 'download button' heuristic further supports the attack pattern of social engineering users into clicking malicious links.

Heuristics 4

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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/wix?keyword=dead+effect+2+apk+mod+mega
    • https://cdn.shopify.com/s/files/1/0431/6299/2799/files/pop_slots_free_chips_2018.pdf
    • https://cdn.shopify.com/s/files/1/0433/4334/7877/files/mesivibamope.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/gabagijujusudizal.pdf
    • https://cdn.shopify.com/s/files/1/0434/8333/2773/files/ncte_norms_2020.pdf
    • https://cdn.shopify.com/s/files/1/0455/7596/2789/files/adverbs_of_manner_and_modifiers_exercises.pdf
    • https://cdn.shopify.com/s/files/1/0434/6177/1430/files/witezaruvuzekavejujit.pdf
    • https://cdn.shopify.com/s/files/1/0432/7263/4533/files/35571512012.pdf
    • https://cdn.shopify.com/s/files/1/0430/9742/4026/files/zomubivuliba.pdf
    • https://cdn.shopify.com/s/files/1/0434/2261/3655/files/nefoboziwamu.pdf
    • https://cdn.shopify.com/s/files/1/0433/6025/6159/files/formal_business_letter_template.pdf
    • https://cdn.shopify.com/s/files/1/0432/7673/0528/files/sataxa.pdf
    • https://cdn.shopify.com/s/files/1/0431/1243/1770/files/nanokugojemovisapupif.pdf
    • https://cdn.shopify.com/s/files/1/0429/7133/2767/files/50433426342.pdf
    • https://cdn.shopify.com/s/files/1/0439/1321/6168/files/49694409762.pdf
    • https://cdn.shopify.com/s/files/1/0432/2561/2450/files/chapter_17_chemical_equilibrium_study_guide_answers.pdf
    • https://cdn.shopify.com/s/files/1/0432/7066/8453/files/33540234307.pdf
    • https://cdn.shopify.com/s/files/1/0431/4116/9309/files/lateral_epicondylitis_home_exercises.pdf
    • https://cdn.shopify.com/s/files/1/0433/9315/5237/files/42440295379.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_off00006524.bin
7b1f0c99c435ec492732d0483e663de630cf9afc16c6161e18a06ee44e15c2ff		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6524 5364 bytes
font_01_sfnt_off0000776c.bin
052adc0d49517737ddaa46a496767c8f442c4aaf221a9a2ea6ccda7244f5155f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x776C 10672 bytes

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