Malicious PDF — malware analysis report

Static analysis result for SHA-256 656e20cc17f72187…

MALICIOUS

PDF

67.3 KB Created: 2020-08-15 02:46:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3f1b3e41287234ae9fdd786fe005ae75 SHA-1: 0da5ca1230b97d56368a69b85f5e2fa9c113e816 SHA-256: 656e20cc17f7218747dcce8368d6e1e69c18271517bd0e0cc9c9b2812f234ac3
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, identified as a link farm, with a primary redirector pointing to a movie-themed URL. This suggests a social engineering tactic to drive traffic to potentially malicious or ad-filled sites. While no scripts were extracted, the PDF structure and embedded links strongly indicate a malicious intent to redirect users.

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.ru/pify?keyword=balupu+hd+movie++telugu
    • http://vabugitu.appledentaleducation.com/uploads/1/3/0/7/130776078/nukirawojewes-wokil.pdf
    • http://files.grignaffiniearthscape.com/uploads/1/3/2/6/132696171/7fba401d6c9.pdf
    • http://files.acrosstheinfinitevoid.com/uploads/1/3/1/6/131637016/falezazepiv.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0430/2068/1377/files/reference_books_for_iit_jam_physics.pdf
    • https://cdn.shopify.com/s/files/1/0434/0105/2310/files/94939581880.pdf
    • https://cdn.shopify.com/s/files/1/0451/5568/0410/files/jekunovofukakutigiwigix.pdf
    • https://cdn.shopify.com/s/files/1/0434/5459/5225/files/57492182631.pdf
    • https://cdn.shopify.com/s/files/1/0431/6954/6395/files/american_pie_reunion_putlockers.pdf
    • https://cdn.shopify.com/s/files/1/0434/4319/1960/files/annual_report.pdf
    • https://cdn.shopify.com/s/files/1/0433/3237/0584/files/31292414992.pdf
    • https://cdn.shopify.com/s/files/1/0431/1718/3130/files/xojas.pdf
    • https://cdn.shopify.com/s/files/1/0438/3653/9045/files/android_studio_3._4_development_essentials_download.pdf
    • https://cdn.shopify.com/s/files/1/0435/5280/0929/files/religious_tourism.pdf
    • https://cdn.shopify.com/s/files/1/0430/6193/6282/files/asteraceae_family_characteristics.pdf
    • https://cdn.shopify.com/s/files/1/0431/5496/4637/files/metuwo.pdf
    • https://cdn.shopify.com/s/files/1/0432/2590/7368/files/90931495332.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_off0000b3d1.bin
5b47941bd0b0468435a73fc98efa4f84e95fd48b975ac7c9e2c825f54b82073e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB3D1 5208 bytes
font_01_sfnt_off0000c573.bin
2fdf7814fd36f9b0c34253ee52ea06df36a15f1e963d0a0a64941d87fc79934b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC573 10808 bytes
font_02_sfnt_off0000eabe.bin
e296a61d2d303e35be9e1a35631556663d2780498efa7e8f3867bf557f172fe6		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEABE 16164 bytes

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