Malicious PDF — malware analysis report

Static analysis result for SHA-256 1374c5f52332e9fa…

MALICIOUS

PDF

41.2 KB Created: 2020-08-14 02:50:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 86695a7d7f1a0b5634fc5b648e93ffa3 SHA-1: b78b4c3c3ffc6108ab1d020343efbb36c50a97d2 SHA-256: 1374c5f52332e9fa87386367d7a1528795f2ddc02e75e2bf021fab52fb6c91af
162 Risk Score

Malware Insights

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

This PDF file contains numerous links, many of which point to a redirector service known for hosting malicious content. The document body includes a link to 'ttraff.cc', a known malicious redirector, and also contains a large number of links to PDFs hosted on Shopify, suggesting a link farm or SEO manipulation tactic. The ML classifier strongly flagged this PDF as malicious, indicating a high probability of malicious intent.

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.cc/pify?keyword=bhagwad+geeta+pdf+in+english
    • http://files.jshel.co/uploads/1/3/1/4/131454523/1462010.pdf
    • http://files.hardwoodrefinishers.com/uploads/1/3/0/8/130874039/2560706.pdf
    • http://files.latin-numbers.com/uploads/1/3/1/0/131070051/03e5ed4.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0432/0470/6464/files/biology_class_11_ncert.pdf
    • https://cdn.shopify.com/s/files/1/0438/4066/7810/files/zavon.pdf
    • https://cdn.shopify.com/s/files/1/0439/0558/1211/files/introduction_to_pure_maths.pdf
    • https://cdn.shopify.com/s/files/1/0450/3732/2390/files/loctite_3609.pdf
    • https://cdn.shopify.com/s/files/1/0435/8651/9208/files/midexuko.pdf
    • https://cdn.shopify.com/s/files/1/0432/6581/8789/files/74587488840.pdf
    • https://cdn.shopify.com/s/files/1/0428/4016/2460/files/block_site_android_phone.pdf
    • https://cdn.shopify.com/s/files/1/0431/6083/0111/files/zipila.pdf
    • https://cdn.shopify.com/s/files/1/0433/5930/5880/files/cashflow_101_game_sheet.pdf
    • https://cdn.shopify.com/s/files/1/0437/7985/0391/files/wafexasawotazam.pdf
    • https://cdn.shopify.com/s/files/1/0428/5346/6271/files/cubase_7_trial_activation_code_crack.pdf
    • https://cdn.shopify.com/s/files/1/0435/6148/4437/files/air_pollution_in_marathi.pdf
    • https://cdn.shopify.com/s/files/1/0428/5012/3932/files/geomorphology_definition.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_off0000620d.bin
9d23a96e5cb2e84a375e69a00078d5f4b1b9c35dc125d64651fa68a992aff743		 pdf-font-stream PDF embedded font (sfnt) at offset 0x620D 5348 bytes
font_01_sfnt_off00007454.bin
5e32a5d379fa30c4c124a2ca5a544b35359c9a5c71e6c8a3fd9d094352db61b9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7454 10420 bytes

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