Malicious PDF — malware analysis report

Static analysis result for SHA-256 0234f5cce1d64068…

MALICIOUS

PDF

39.1 KB Created: 2020-08-22 11:52:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 02d7186ac3a8e2b7cebe38e531b5ded9 SHA-1: bca49afbb6ec50aad64ac7ed03a3e9a07fa4f0d7 SHA-256: 0234f5cce1d6406860678fa73ff450ae6b2cba6ac7daaf10b56acd93c8e5d9cb
162 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains multiple embedded links, with one specifically identified as a malicious redirector to 'ttraff.com'. The document body, though obfuscated, contains text related to an acknowledgment form and the malicious URL, suggesting a social engineering lure. The presence of numerous external PDF links, many hosted on Shopify, indicates a link farm used to distribute malicious content or improve SEO for malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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=acknowledgment+form+for+training
    • http://files.davemounsey.com/uploads/1/3/0/8/130874614/5728280.pdf
    • http://fifino.drvegetableinc.com/uploads/1/3/2/3/132302868/85ad8af17809.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0460/0555/1271/files/define_sample_answer.pdf
    • https://cdn.shopify.com/s/files/1/0435/5060/5461/files/livaganugemadekenofojovaw.pdf
    • https://cdn.shopify.com/s/files/1/0459/8779/1015/files/carrier_xpower_remote_control_manual.pdf
    • https://cdn.shopify.com/s/files/1/0431/5398/1594/files/mame_cps2_bios.pdf
    • https://cdn.shopify.com/s/files/1/0435/3903/8359/files/cash_flow_statement_project_report.pdf
    • https://cdn.shopify.com/s/files/1/0431/8878/1219/files/ionic_and_covalent_bonding_practice_with_answers.pdf
    • https://cdn.shopify.com/s/files/1/0430/8425/1285/files/2122198557.pdf
    • https://cdn.shopify.com/s/files/1/0439/3612/0990/files/adrenaline_mechanism_of_action.pdf
    • https://cdn.shopify.com/s/files/1/0437/4511/6311/files/lekumeverugiko.pdf
    • https://cdn.shopify.com/s/files/1/0430/8906/8185/files/zuserezinomubonivipe.pdf
    • https://cdn.shopify.com/s/files/1/0434/1753/4629/files/gamubixonegozonuf.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005c70.bin
70dfff22b7522d52a7da4ca1fe2fe7240b32117d2155bb97ca43a362fb96c92b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5C70 5308 bytes
font_01_sfnt_off00006e73.bin
f86be094b80044e2dcdca0663a8895e664ac1789f3567ceaea32204a6ab45d57		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6E73 9724 bytes

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