Malicious PDF — malware analysis report

Static analysis result for SHA-256 4f48e8da5634f16f…

MALICIOUS

PDF

36.5 KB Created: 2020-08-18 23:38:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a04e8994dcd8dca52c950e849fe713f2 SHA-1: 4ac4c6d015d0eaa44d6a37d0a824679154ca3fd1 SHA-256: 4f48e8da5634f16f7e34f5684cc9aa3f2d7f4f856d11dcc58a3e0204be63cb3b
150 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'ttraff.com'. The document body, though heavily obfuscated, includes the same URL and appears to be a lure related to 'imagine dragons believer easy piano sheet music'. The presence of numerous other PDF links, many hosted on Shopify, suggests a link farm or distribution mechanism. The ML classifier also strongly flagged this PDF as malicious.

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.com/pify?keyword=imagine+dragons+believer+easy+piano+sheet+music
    • http://files.classwithheise.com/uploads/1/3/0/7/130740211/f2d75b.pdf
    • http://files.rbcdublin.org/uploads/1/3/1/6/131636907/vesasufewero_tatuk_webixiwa_nedaxijo.pdf
    • http://files.iobcwa.org/uploads/1/3/2/7/132712116/zudonifo-zupupuwewizex-vudokomuli.pdf
    • http://files.sixpackedin.com/uploads/1/3/2/6/132695546/tazokudaj.pdf
    • http://files.sidleymountaincowboychurch.com/uploads/1/3/1/4/131413718/4169511.pdf
    • https://cdn.shopify.com/s/files/1/0435/4015/2479/files/ielts_speaking_part_3_with_answers.pdf
    • https://cdn.shopify.com/s/files/1/0437/7152/7325/files/pathfinder_player_companion_animal_archive.pdf
    • https://cdn.shopify.com/s/files/1/0431/6636/7895/files/bleach_season_4_episode_1.pdf
    • https://cdn.shopify.com/s/files/1/0431/0230/6468/files/sunit.pdf
    • https://cdn.shopify.com/s/files/1/0428/9704/7718/files/calculus_10th_edition_solutions.pdf
    • https://cdn.shopify.com/s/files/1/0428/7853/3791/files/auditory_phonetics.pdf
    • https://cdn.shopify.com/s/files/1/0430/9581/8397/files/runadudofimuliwosefex.pdf
    • https://cdn.shopify.com/s/files/1/0432/2761/1300/files/50321979697.pdf
    • https://cdn.shopify.com/s/files/1/0436/5369/3593/files/autosar_sws_can_network_management._4._3.pdf
    • https://cdn.shopify.com/s/files/1/0431/7108/6492/files/photoshop_cs2_adobe.pdf
    • https://cdn.shopify.com/s/files/1/0432/7286/3904/files/83322008408.pdf
    • https://cdn.shopify.com/s/files/1/0445/6503/7220/files/november_bulletin_board_ideas.pdf
    • https://cdn.shopify.com/s/files/1/0431/9140/2660/files/308_negra_arroyo_lane.pdf
    • https://cdn.shopify.com/s/files/1/0450/6419/2150/files/adobe_reader_9_old_version_free.pdf
    • https://cdn.shopify.com/s/files/1/0432/3305/0779/files/carmina_burana_piano_score.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_off00005203.bin
21804e867734ed094bb20a67ac71ffd31c481c01524e97e479e89bd66712c35e
pdf-font-stream PDF embedded font (sfnt) at offset 0x5203 5724 bytes
font_01_sfnt_off0000654c.bin
6dccd298e7b8bf1f9c098440fe59ea0b6e304cf438a8c6c479b8be146bfe62f9
pdf-font-stream PDF embedded font (sfnt) at offset 0x654C 9180 bytes