Malicious PDF — malware analysis report

Static analysis result for SHA-256 a20531f13543a963…

MALICIOUS

PDF

78.7 KB Created: 2020-09-06 17:21:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8d56146aa54ed483d140fe5cdf465318 SHA-1: c0ff4565f4abd9a1e92524a23d3c53b0bdbef33a SHA-256: a20531f13543a963ae5e307e8f94905fdcb3ee5b3bf198b3e635836b68adee64
128 Risk Score

Malware Insights

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

The PDF contains embedded links, with one specifically pointing to a redirector URL ('https://ttraff.com/pify?keyword=dialectical+behavior+therapy+worksheets+pdf') that is flagged as malicious. The document body, though heavily obfuscated, contains text suggesting a lure related to 'dialectical behavior therapy worksheets pdf' and a call-to-action phrase, indicating a social engineering attempt to trick the user into clicking the malicious link. The presence of a link farm further supports the malicious intent.

Heuristics 4

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=dialectical+behavior+therapy+worksheets+pdf
    • https://cdn.shopify.com/s/files/1/0434/1461/8277/files/kevojazilibusimepo.pdf
    • https://cdn.shopify.com/s/files/1/0429/4790/3644/files/57720589628.pdf
    • https://cdn.shopify.com/s/files/1/0436/5670/8254/files/78585676054.pdf
    • https://cdn.shopify.com/s/files/1/0437/7578/7162/files/bus_rush_game_free_apk.pdf
    • https://static.usrfiles.com/ugd/2d797c_065b7a469e88486cab787c7637815c99.pdf
    • https://static.usrfiles.com/ugd/9cb927_7b94cdc458134f25b33b6cbb6e9d99d8.pdf
    • https://static.usrfiles.com/ugd/ade4e6_4e3a20f4430b403bbf9cf5bf4e16bdaa.pdf
    • https://static.usrfiles.com/ugd/df73ab_d4a70ab195364996b9439582d0950e42.pdf
    • https://static.usrfiles.com/ugd/ab922d_a46e172edaec496abf9e315a6576ab16.pdf
    • https://static.usrfiles.com/ugd/affb4a_36b51ba601034d0fa3415940337dd202.pdf
    • https://static.usrfiles.com/ugd/6908d7_963a6ab3417a459986b24166ddbb28ec.pdf
    • https://static.usrfiles.com/ugd/7cefa9_123ca6928fc84ea48f0a89b0a01f5763.pdf
    • https://static.usrfiles.com/ugd/b8c837_0936679e5e8f45da934086d05a081a7a.pdf
    • https://static.usrfiles.com/ugd/2f7815_7b6412b02046426e9c0fdef9475fb764.pdf
    • https://static.usrfiles.com/ugd/9cb927_f921bedcb328485ca83ba889d32067b0.pdf
    • https://static.usrfiles.com/ugd/b8c837_a780ce450f614092ad228dac8e8e6997.pdf
    • https://static.usrfiles.com/ugd/81d6a4_27ba4192a92c4e5cae3c7a137d99b877.pdf
    • https://static.usrfiles.com/ugd/610d21_c299767376a34421bfba02a8633c394c.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_off0000dade.bin
03e7a317edc84b6e0647030ae6a7b3ca0418b926e8f63170a30caaf2c6d510cb		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDADE 5380 bytes
font_01_sfnt_off0000ed4e.bin
ef265b845a05cf2ed1c424f90e913cf32046535ad4c6f28c1de09f0921eadc22		 pdf-font-stream PDF embedded font (sfnt) at offset 0xED4E 15980 bytes
font_02_sfnt_off00011ef4.bin
9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11EF4 4324 bytes

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