Malicious PDF — malware analysis report

Static analysis result for SHA-256 1c9d9a323ac18123…

MALICIOUS

PDF

41.8 KB Created: 2020-09-14 06:48:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b2a8010f126fa3e0e40a6ec6e1d5cf62 SHA-1: 5eba2943aa848123ac3d1b0aa5c84e309d03baba SHA-256: 1c9d9a323ac18123e9e83542504ce813ac53c77378eefd842249a4db313d3a3c
150 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, including one to a known malicious redirector infrastructure. The ML classifier also flagged this PDF with high confidence. The document body appears to be malformed or obfuscated, but the presence of numerous external links suggests a link farm or redirection scheme. No scripts were extracted from this sample.

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.club/pify?keyword=cardboard+relief+sculpture+bird
    • http://files.carecoordinatorsinc.com/uploads/1/3/0/7/130739916/eb7a9c4d4f5.pdf
    • http://files.champsfleuris.com/uploads/1/3/0/7/130775145/5398304.pdf
    • http://zavamaba.caitlinanthony.com/uploads/1/3/2/8/132815154/lujivar-pofepi-pelaxukatimamof.pdf
    • http://files.carnabyscooters.com/uploads/1/3/2/6/132695851/2837865.pdf
    • http://files.allentertainmentuk.com/uploads/1/3/0/7/130775432/gutobofujode-fixodap-likeregi-donuzotufew.pdf
    • http://files.altitudephysicaltherapy.com/uploads/1/3/1/0/131070566/muruduv.pdf
    • http://files.rachelbgreene.com/uploads/1/3/1/4/131438639/xilevunowom.pdf
    • http://xuvopifa.thehockeyprofessor.org/uploads/1/3/0/8/130874426/lijulamuzo_dakow.pdf
    • http://fugoj.reading-is-lit.com/uploads/1/3/1/4/131452954/fuzawirebuj-xuvuti-mosomemeneliv.pdf
    • http://bifubusok.tpccommunicationsaustin.com/uploads/1/3/0/7/130739892/ropag_peledem_bijaxaroxadowa.pdf
    • https://cdn.shopify.com/s/files/1/0427/4615/1078/files/adobe_premiere_6._5_effects_free.pdf
    • https://cdn.shopify.com/s/files/1/0430/6118/2617/files/platform_bed_with_drawers_ikea.pdf
    • https://cdn.shopify.com/s/files/1/0435/3762/9348/files/fighter_5e_guide_2018.pdf
    • https://cdn.shopify.com/s/files/1/0434/4204/5090/files/azhage_azhage_album_video_song_isaimini.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_off0000666c.bin
c58aa5006cd0c92ddd7c2eda9d1b412eca0b7ab2ae5d01c01c54bc7fbe631e36		 pdf-font-stream PDF embedded font (sfnt) at offset 0x666C 5196 bytes
font_01_sfnt_off0000781c.bin
2c766286051b6096fc8d2f0de462dc17fa5af460bccfd7987b33fc2a2e9e5986		 pdf-font-stream PDF embedded font (sfnt) at offset 0x781C 10088 bytes

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