Malicious PDF — malware analysis report

Static analysis result for SHA-256 bdfe005b4c57ea13…

MALICIOUS

PDF

61.3 KB Created: 2020-08-07 01:00:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7dfd912bb509aee20f1bc048724c3677 SHA-1: f972949a2d600cc9cbc35ae3aca8142136e05b18 SHA-256: bdfe005b4c57ea131995004c1ff6ee943f5335f0d08b467584ac6e6f100885d2
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF file contains a link farm and a malicious redirector, indicating a phishing or scam attempt. The embedded URL, 'https://ttraff.com/pify?keyword=algebra+questions+for+grade+7+pdf', is identified as a malicious redirector. The document body, though heavily obfuscated, contains text related to 'Algebra questions for grade 7 pdf', suggesting a lure to trick users into clicking the malicious link. The presence of numerous external PDF links further supports the link farm heuristic.

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.com/pify?keyword=algebra+questions+for+grade+7+pdf
    • http://files.emilytvanek.com/uploads/1/3/1/3/131382032/pamafa_wamajinimisa_vefapatukuze.pdf
    • http://files.forsalepalawan.com/uploads/1/3/1/3/131381612/5405284.pdf
    • http://files.nyeusiworld.com/uploads/1/3/1/6/131607163/debogeworukoxaz-xufurarudazi-matav-wagofuxusevi.pdf
    • http://files.stephenlaurie.com/uploads/1/3/0/8/130873842/josusibebizevorin.pdf
    • https://cdn.shopify.com/s/files/1/0430/5387/5357/files/rirak.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/benivat.pdf
    • https://cdn.shopify.com/s/files/1/0437/2119/5688/files/rokapekatixa.pdf
    • https://cdn.shopify.com/s/files/1/0429/6769/5509/files/wogetomemoturosetanikujel.pdf
    • https://cdn.shopify.com/s/files/1/0430/3729/4745/files/83565370687.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/dubisetebezurazoxodo.pdf
    • https://cdn.shopify.com/s/files/1/0429/9423/7589/files/aristophanes_lysistrata_and_other_plays.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/36149341097.pdf
    • https://cdn.shopify.com/s/files/1/0432/4347/1003/files/58562081662.pdf
    • https://cdn.shopify.com/s/files/1/0428/9432/7961/files/ssc_stenographer_2020_vacancy.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_off0000998a.bin
607e704f0e0349f81747919116e5506e6dc89fd714665d7470e05ea5f2609a99		 pdf-font-stream PDF embedded font (sfnt) at offset 0x998A 5428 bytes
font_01_sfnt_off0000abff.bin
8e33bb0645c4b25f889e46b80483ed7ef7c60090d15d144b773d9fa78cdd1bf0		 pdf-font-stream PDF embedded font (sfnt) at offset 0xABFF 14268 bytes
font_02_sfnt_off0000d981.bin
ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD981 4324 bytes

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