Malicious PDF — malware analysis report

Static analysis result for SHA-256 6e29f0ecbf5d9395…

MALICIOUS

PDF

67.3 KB Created: 2020-08-05 23:00:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a14ba907f2e091f705d7423330de0dec SHA-1: 9919e84737b7ffd4046cfd9d5ca66e0ab1ef75c0 SHA-256: 6e29f0ecbf5d9395e02741f870fa8d497e51afa3c5fa86dec38a880794723025
154 Risk Score

Malware Insights

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

The PDF contains a link farm and a specific malicious redirector URL, indicating an attempt to lead users to potentially harmful content. The ML classifier strongly flagged this PDF as malicious. The embedded URL and the document body text suggest a lure related to a book download, which is a common phishing tactic.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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.
  • 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.cc/pify?keyword=dreams+from+my+father+pdf+in+marathi
    • http://files.omorikuratau.com/uploads/1/3/1/8/131871692/4975945.pdf
    • http://files.alyssavegerphotography.com/uploads/1/3/2/6/132682441/wivodopobojami.pdf
    • http://files.hurstdesign.net/uploads/1/3/1/6/131637056/b1a4d038.pdf
    • http://files.coachdavidhenley.com/uploads/1/3/0/8/130814205/5a33764de7.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0432/8849/4236/files/senran_kagura_estival_versus_download.pdf
    • https://cdn.shopify.com/s/files/1/0436/5982/1209/files/begobifolivoviluneweri.pdf
    • https://cdn.shopify.com/s/files/1/0430/3867/1010/files/rerupevazufijadikupiliduf.pdf
    • https://cdn.shopify.com/s/files/1/0430/0016/8597/files/change_your_brain_change_your_life.pdf
    • https://cdn.shopify.com/s/files/1/0431/3251/8555/files/wuxaji.pdf
    • https://cdn.shopify.com/s/files/1/0427/8131/1132/files/roxosuwotosebutopemokabek.pdf
    • https://cdn.shopify.com/s/files/1/0437/4121/6919/files/michaela_schwyhart_twitter.pdf
    • https://cdn.shopify.com/s/files/1/0433/3902/2494/files/majajuxizewaris.pdf
    • https://cdn.shopify.com/s/files/1/0432/7315/8821/files/lupevadisukomikiwogabax.pdf
    • https://cdn.shopify.com/s/files/1/0430/7664/9124/files/an_introduction_to_actuarial_mathematics_gupta.pdf
    • https://cdn.shopify.com/s/files/1/0429/4197/2636/files/76380199992.pdf
    • https://cdn.shopify.com/s/files/1/0429/2660/4447/files/20385206740.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000931a.bin
75571f414e627e77f951a2a3f2164b249fc962d9f2b5c4a0aea25f97d639bc41		 pdf-font-stream PDF embedded font (sfnt) at offset 0x931A 10320 bytes
font_01_sfnt_off0000b54f.bin
b2b5b88fcb305874808b87eaf784f8eb7aa208f0ad948b540708f4adca021487		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB54F 5136 bytes
font_02_sfnt_off0000c6a3.bin
e935c17e62a148a316e11c34741055a3b598a360fa3e78c3acda3d9bf384d3dc		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC6A3 13764 bytes
font_03_sfnt_off0000f0e0.bin
cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF0E0 4324 bytes

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