Malicious PDF — malware analysis report

Static analysis result for SHA-256 a339aa6b125c8600…

MALICIOUS

PDF

45.4 KB Created: 2020-08-20 06:09:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ae1c02da904bbdb362a508574b5d170e SHA-1: 8ec7a69a413fcb725edec96117b9c78f79b0c45d SHA-256: a339aa6b125c8600be527694e677926bd97b882a7ffa3e3d53dbaf6a23317133
150 Risk Score

Malware Insights

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

The PDF contains a link that redirects to known malicious infrastructure, as indicated by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body, though heavily obfuscated, contains the same malicious URL and appears to be a lure related to a marketing report. The PDF_SEO_LINK_FARM heuristic also indicates a large number of external links, suggesting a link farm designed to attract traffic or distribute malware.

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/pify?keyword=marketing+report+to+board+of+directors+example
    • http://xupeguw.pernaphoto.com/uploads/1/3/0/7/130738837/8550161.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/pegumi.pdf
    • https://cdn.shopify.com/s/files/1/0435/9703/7727/files/cantaloupe_island_piano_solo_transcription.pdf
    • https://cdn.shopify.com/s/files/1/0434/7042/2180/files/82467206970.pdf
    • https://cdn.shopify.com/s/files/1/0433/2093/4558/files/attestation_de_prise_en_charge.pdf
    • https://cdn.shopify.com/s/files/1/0430/6350/9143/files/bixow.pdf
    • https://cdn.shopify.com/s/files/1/0432/2715/2539/files/60083955968.pdf
    • https://cdn.shopify.com/s/files/1/0433/4852/5206/files/lezemebuperal.pdf
    • https://cdn.shopify.com/s/files/1/0438/2906/7933/files/vezaradurovuponenikuper.pdf
    • https://cdn.shopify.com/s/files/1/0440/4976/0421/files/funikazatevojujalidelime.pdf
    • https://cdn.shopify.com/s/files/1/0429/9508/9559/files/84743756213.pdf
    • https://cdn.shopify.com/s/files/1/0437/4790/1592/files/gigisike.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000651c.bin
f84264782a92b2926336f3c4423c8d83bfff8122bcd55150aff180ee45d66b33		 pdf-font-stream PDF embedded font (sfnt) at offset 0x651C 5540 bytes
font_01_sfnt_off000077dd.bin
1de5a22765b2020c96ca909a00c66f60ff810c84233eca0cfb181ec5e69931f6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x77DD 10176 bytes
font_02_sfnt_off00009a9d.bin
9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9A9D 4324 bytes

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