Malicious PDF — malware analysis report

Static analysis result for SHA-256 179455aaf1ed3792…

MALICIOUS

PDF

46.5 KB Created: 2020-08-16 00:47:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 82830f12c9191dc5667ac0d319b65a94 SHA-1: df0eeed4f74b2d0f8e6341a6c50102b605f9a97a SHA-256: 179455aaf1ed3792cf85bb1f08727032946b122b1b541762a6fcbcb12bf7c5c1
162 Risk Score

Malware Insights

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

The PDF contains a prominent link disguised as a download for 'Doraemon cartoon free mp4'. This link redirects to a known malicious redirector, indicating a phishing or malware distribution attempt. The document also hosts a large number of other PDF links, likely for SEO manipulation or to spread further malicious content. No scripts were extracted, but the presence of malicious links and the ML classifier's high confidence suggest a 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.ru/pify?keyword=doraemon+cartoon++free+mp4
    • http://files.haltnorth.com/uploads/1/3/0/7/130739831/3753369.pdf
    • http://files.manningdesignla.com/uploads/1/3/1/0/131070289/5106171.pdf
    • http://nafofa.goodcompany.works/uploads/1/3/0/8/130874359/6184997.pdf
    • http://files.mattduffybaseball.com/uploads/1/3/1/3/131380786/2b6f90e42.pdf
    • http://files.dianegravel.com/uploads/1/3/1/6/131636745/nadavigazinanafe.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0429/7110/3395/files/vexafaviguxaxagatojigip.pdf
    • https://cdn.shopify.com/s/files/1/0439/4903/1592/files/geledemewizoponotoka.pdf
    • https://cdn.shopify.com/s/files/1/0435/7141/3151/files/causation_and_correlation.pdf
    • https://cdn.shopify.com/s/files/1/0437/9721/7440/files/angry_birds_transformers_telepods_qr_codes_hack.pdf
    • https://cdn.shopify.com/s/files/1/0433/7316/6757/files/kirevezogifetikuxepijire.pdf
    • https://cdn.shopify.com/s/files/1/0435/2219/5608/files/xubebatitudixuvanar.pdf
    • https://cdn.shopify.com/s/files/1/0430/2897/1681/files/79135321733.pdf
    • https://cdn.shopify.com/s/files/1/0430/8012/2532/files/gafabinapuwul.pdf
    • https://cdn.shopify.com/s/files/1/0434/3077/2901/files/vepufunopazuzef.pdf
    • https://cdn.shopify.com/s/files/1/0449/7843/8302/files/jenaxagagedigarule.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006026.bin
43592d114724e210f7963d7e6c29f81bf16b7c9c4af3541aabf3ca7640203e68		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6026 5036 bytes
font_01_sfnt_off00007137.bin
141ef9183eeb404e2f48c94727f204f0d120453d126c91061de0ab876de78362		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7137 10716 bytes
font_02_sfnt_off0000955c.bin
9cb0650af5bdb2e8593988a361a40fe1030b61ea25d8fce7fab67310e0b1f9a7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x955C 16352 bytes

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