Malicious PDF — malware analysis report

Static analysis result for SHA-256 38774e5f2a68d60e…

MALICIOUS

PDF

34.9 KB Created: 2020-09-01 05:08:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 98c7d07613f674062371adfd5419d433 SHA-1: 5f2984cdf093abece3fd52e00b4bb0ed6fc8bbff SHA-256: 38774e5f2a68d60ef0db0bbf3a5b32b60cbf42001a1f0dc5f005663fa6ac0d6d
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.001 Malicious Link

The PDF file contains multiple embedded links, with one specifically pointing to a known malicious redirector. The document body, though heavily obfuscated, contains text that appears to be a lure related to 'beetalk versi lama'. The presence of a link farm heuristic further indicates an attempt to distribute malicious content. The primary attack vector is likely a user clicking on the malicious link within the PDF, leading them to the redirector.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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/wix?keyword=link++beetalk+versi+lama
    • https://cdn.shopify.com/s/files/1/0429/6019/1641/files/wupuvinusozividise.pdf
    • https://cdn.shopify.com/s/files/1/0431/4071/0562/files/i_am_exempt_from_fatca_reporting.pdf
    • https://cdn.shopify.com/s/files/1/0433/4904/9494/files/human_anatomy_and_physiology_with_pathophysiology_tortora.pdf
    • https://static.usrfiles.com/ugd/8cbfce_a51609e2bf244a0da39bcc483738bea1.pdf
    • https://static.usrfiles.com/ugd/37428b_1df03690533745adb13a05f6c2a5590e.pdf
    • https://static.usrfiles.com/ugd/83f04e_55589ce7ac23429faa70044759814eb3.pdf
    • https://static.usrfiles.com/ugd/f65518_9f727c7aa62940999624cb454a3031aa.pdf
    • https://static.usrfiles.com/ugd/e3ff21_be163fa289ab4943b90deb054df5823b.pdf
    • https://cdn.shopify.com/s/files/1/0461/9026/4469/files/savezofekin.pdf
    • https://cdn.shopify.com/s/files/1/0431/5407/9910/files/buwot.pdf
    • https://cdn.shopify.com/s/files/1/0429/8699/5863/files/tundra_ola_gjeilo.pdf
    • https://cdn.shopify.com/s/files/1/0437/7945/7173/files/88232657660.pdf
    • https://cdn.shopify.com/s/files/1/0432/5359/6310/files/wuvakenono.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_off00004b16.bin
c6470bb029210f2348bdfb3c427d1fc7ce4dc613e0dd082a9906707bf682fe37		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4B16 5036 bytes
font_01_sfnt_off00005c2f.bin
9d8082afa706ca01755ba8a9bb6a7ee84cdf436e6121f8c11b54ceadd44cf60a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5C2F 10328 bytes

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