Malicious PDF — malware analysis report

Static analysis result for SHA-256 8c87af84f194e01e…

MALICIOUS

PDF

52.9 KB Created: 2020-07-29 23:45:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7b1e0f129c84a100c1e47bf5e7ba2a20 SHA-1: f1aea153555eae0bd6841ae205e15d806af1e9e0 SHA-256: 8c87af84f194e01e6aa177cf367acaeaaca826cd3eed3bd5ef13b8a1878cfe83
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, with one specifically pointing to a known malicious redirector. The document body is heavily obfuscated and appears to be junk data, suggesting the primary purpose is to host these links. The presence of a malicious redirector URL indicates an attempt to lure users to malicious sites.

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=tragedia+griega+prometeo+encadenado+pdf
    • http://files.restauranthibiscus.com/uploads/1/3/0/7/130776841/5106130.pdf
    • http://files.whatmakesagreatschool.com/uploads/1/3/2/6/132695782/6002867.pdf
    • http://files.mzsacredhealing.com/uploads/1/3/1/4/131406610/7767372.pdf
    • https://cdn.shopify.com/s/files/1/0435/6263/1326/files/48067960169.pdf
    • https://cdn.shopify.com/s/files/1/0431/1928/0288/files/61566691961.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/palafasejuzanuz.pdf
    • https://cdn.shopify.com/s/files/1/0435/9408/8616/files/goxekutogoz.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/42778697636.pdf
    • https://cdn.shopify.com/s/files/1/0434/1704/3111/files/84885415625.pdf
    • https://cdn.shopify.com/s/files/1/0437/9561/1805/files/31100389834.pdf
    • https://cdn.shopify.com/s/files/1/0431/2114/8061/files/daberumuzufiruzape.pdf
    • https://cdn.shopify.com/s/files/1/0438/2988/7136/files/40728368301.pdf
    • https://cdn.shopify.com/s/files/1/0429/4865/7318/files/21481139829.pdf
    • https://cdn.shopify.com/s/files/1/0433/2732/4310/files/96030333250.pdf
    • https://cdn.shopify.com/s/files/1/0433/2303/1720/files/vajolo.pdf
    • https://cdn.shopify.com/s/files/1/0433/0441/9478/files/65269144365.pdf
    • https://cdn.shopify.com/s/files/1/0438/0806/3649/files/tadalidezemexinirude.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/
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/42778697636

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00008365.bin
1c79c47653cb3626d3862d5b26f6f7db3d1fdd0a9e472c2231eede16a32d3224		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8365 5004 bytes
font_01_sfnt_off0000944d.bin
c2d342df2efd6ab632bf09b8e595f440e73e6da78a567fd0245428ffc98bf83d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x944D 16888 bytes

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