Malicious PDF — malware analysis report

Static analysis result for SHA-256 70cd24f66470b1cc…

MALICIOUS

PDF

47.8 KB Created: 2020-08-24 14:08:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f5d1b5e29150e552336068bf44dda7c7 SHA-1: 4094f51a48796dd87e8034d0fa3dbe51a778a25f SHA-256: 70cd24f66470b1ccbf02a4ed9d72db33b2eac252aa9745604c96321044e8799d
154 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.ru, which is likely used to host or deliver a second-stage payload. The document body, though heavily obfuscated, contains the same URL and appears to be a lure for movie downloads, a common tactic for phishing or malware distribution. The presence of numerous external PDF links suggests a link farm or SEO poisoning attempt to increase visibility.

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=dhakad+chhora+movie++mp4
    • http://files.icdlearning.com/uploads/1/3/0/7/130776483/wunogatigenebib-liwekedudel.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://fedorahosted.org/lohit
    • https://cdn.shopify.com/s/files/1/0434/9670/2104/files/22647022657.pdf
    • https://cdn.shopify.com/s/files/1/0431/9451/5614/files/51687589381.pdf
    • https://cdn.shopify.com/s/files/1/0432/0080/7070/files/1871681453.pdf
    • https://cdn.shopify.com/s/files/1/0430/1720/7971/files/febonijenisewimojotike.pdf
    • https://cdn.shopify.com/s/files/1/0435/0659/8040/files/microsoft_office_creating_labels_from_excel_spreadsheet.pdf
    • https://cdn.shopify.com/s/files/1/0437/2326/0058/files/bidufalejutajilonaxugis.pdf
    • https://cdn.shopify.com/s/files/1/0430/8425/1285/files/42191432070.pdf
    • https://cdn.shopify.com/s/files/1/0436/1243/8685/files/bigazizepa.pdf
    • https://cdn.shopify.com/s/files/1/0432/4425/7442/files/mabejo.pdf
    • https://cdn.shopify.com/s/files/1/0430/3791/7333/files/7567924821.pdf
    • https://cdn.shopify.com/s/files/1/0438/7402/5640/files/lufaxafijinumuzowevenon.pdf
    • https://cdn.shopify.com/s/files/1/0434/1491/3191/files/86101805425.pdf
    • https://cdn.shopify.com/s/files/1/0440/8007/0808/files/11672912108.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005b29.bin
2c07ebe848678b2c05708c3d6f5c96db3a5f44f40d6d9cc3c804087889c11eae		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5B29 5316 bytes
font_01_sfnt_off00006d25.bin
f8cd1fa18a97631cb3b1ae9df73fd7c5c38954f98b6bfb88978172c761c9d9b5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6D25 10096 bytes
font_02_sfnt_off00008fff.bin
7ba0a97165a5e226c9fab472f60571acb520680a646ecec6cb99941fa3a4c604		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8FFF 10920 bytes

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