Malicious PDF — malware analysis report

Static analysis result for SHA-256 d44b3f8694f4807e…

MALICIOUS

PDF

39.0 KB Created: 2020-08-16 17:12:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 48eb58dadc043fece208938dc8a123fb SHA-1: 857dcf13ee25283a3886ef8c5a3775d84da563b4 SHA-256: d44b3f8694f4807e6ccaa52b955d7d358ef310cd47b2a65d2fe4d9a37f1bd77d
120 Risk Score

Malware Insights

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

The PDF file contains a significant number of embedded links, many of which are hosted on Shopify domains and appear to form a link farm. These links ultimately redirect to a malicious URL, ttraff.ru, which is flagged as a malicious redirector. The document body itself is largely corrupted, but the presence of the 'Borderlands 2 salvador skill tree guide' text suggests a lure to entice users to click the malicious links. No scripts were extracted from this sample.

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.ru/pify?keyword=borderlands+2+salvador+skill+tree+guide
    • http://files.apeacefulbirthdoula.com/uploads/1/3/0/9/130969440/5828cbf8.pdf
    • https://cdn.shopify.com/s/files/1/0440/7898/9462/files/rotolomebalagatobipedax.pdf
    • https://cdn.shopify.com/s/files/1/0435/5037/6100/files/tuvifaveduritujezolam.pdf
    • https://cdn.shopify.com/s/files/1/0430/4430/7098/files/lopexazutorepi.pdf
    • https://cdn.shopify.com/s/files/1/0432/3419/7666/files/19919598793.pdf
    • https://cdn.shopify.com/s/files/1/0430/8775/7461/files/english_speaking_practice_sentences.pdf
    • https://cdn.shopify.com/s/files/1/0436/8711/6965/files/sai_baba_satcharitra_telugu.pdf
    • https://cdn.shopify.com/s/files/1/0429/9004/3285/files/68375936502.pdf
    • https://cdn.shopify.com/s/files/1/0438/1927/0306/files/96463891449.pdf
    • https://cdn.shopify.com/s/files/1/0436/0021/6232/files/69967055399.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/ruwisosipopiwusanitilowaz.pdf
    • https://cdn.shopify.com/s/files/1/0437/0087/9510/files/physics_formulas_class_11_and_12.pdf
    • https://cdn.shopify.com/s/files/1/0437/1031/6694/files/58211885730.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_off00005b87.bin
ae391b60de00444dd98916fd52afb1c14fde1be239c5079d3751d3aecf145249		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5B87 5296 bytes
font_01_sfnt_off00006daa.bin
d841d4739ce289517b623711439b26d79e688967b894daa3f2114115a6235a73		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6DAA 9900 bytes

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