Malicious PDF — malware analysis report

Static analysis result for SHA-256 66ddac5ec138e16a…

MALICIOUS

PDF

43.6 KB Created: 2020-08-22 18:33:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e079db564cdd962565a9cc6d31497534 SHA-1: 3c7b5f9626c984705ae99eada3379519b80ee81f SHA-256: 66ddac5ec138e16aec7f24e716e7ee457b59676571418c8cb34b6b2a6843b02f
162 Risk Score

Malware Insights

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

The PDF contains numerous links, with one critical heuristic identifying a redirector to known malicious infrastructure. The document body, though partially obfuscated, includes a lure related to movie songs and a call-to-action phrase, suggesting a phishing or scam attempt. The presence of many external PDF links further indicates a link farm designed to distribute malicious content.

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=abhiyum+naanum+movie+mp4+songs+free
    • http://seforefof.mirroryourbrillianceonvideo.com/uploads/1/3/0/7/130738970/fujib-vebilamid.pdf
    • http://nukelased.buscolibrary.org/uploads/1/3/0/7/130738850/3501096.pdf
    • http://minabexa.hansvercauteren.com/uploads/1/3/0/8/130814328/6c5ab.pdf
    • http://files.northcountytrees.org/uploads/1/3/2/6/132681690/6945000.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0430/3850/7169/files/lidananubonasujobesalefuj.pdf
    • https://cdn.shopify.com/s/files/1/0435/8150/5695/files/capital_expenditure_meaning.pdf
    • https://cdn.shopify.com/s/files/1/0433/4852/5208/files/besaxa.pdf
    • https://cdn.shopify.com/s/files/1/0431/6784/2459/files/79224138409.pdf
    • https://cdn.shopify.com/s/files/1/0430/8720/0418/files/aldous_huxley_english.pdf
    • https://cdn.shopify.com/s/files/1/0431/0335/5034/files/nemerojoketixizadure.pdf
    • https://cdn.shopify.com/s/files/1/0428/7453/6103/files/wotaresigorobavazepilamu.pdf
    • https://cdn.shopify.com/s/files/1/0431/8052/3678/files/44064431386.pdf
    • https://cdn.shopify.com/s/files/1/0432/4048/9122/files/allegro_free_physical_viewer_tutorial.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/3294478915.pdf
    • https://cdn.shopify.com/s/files/1/0428/8974/0441/files/jowaligixelusasiwutolakog.pdf
    • https://cdn.shopify.com/s/files/1/0433/9063/2101/files/nacionalismo_burgues_y_nacionalismo_revolucionario.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_off0000509e.bin
069ae8503fdcad44a76eca5d735ce8e79b6b5fa7a8478f5f508382c67228e311		 pdf-font-stream PDF embedded font (sfnt) at offset 0x509E 5664 bytes
font_01_sfnt_off000063ce.bin
433a0e2f80626cbe2ce75f47e98a44fd8c5dd7a2b8a8dc3dd82459e20895bd5a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x63CE 9788 bytes
font_02_sfnt_off00008596.bin
47e5f4ea0053b3da259d74e983be8e9a7c31fe44c3203c6e5404c86e48202628		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8596 17324 bytes

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