Malicious PDF — malware analysis report

Static analysis result for SHA-256 85dc7fb7012e5acd…

MALICIOUS

PDF

45.5 KB Created: 2020-07-29 22:52:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 148f482073439dc6aa0a17d9e48e95fc SHA-1: c435eee4dbd2750eed9c07a1330f7a733d21f713 SHA-256: 85dc7fb7012e5acd2c2dfad3ec964ac9f468cbbe5ed8a2f4d7fad54449435826
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.ru'. Additionally, it exhibits characteristics of a PDF SEO link farm, with numerous embedded links, many hosted on Shopify. The ML classifier also strongly indicated maliciousness. The primary attack pattern involves redirecting users through potentially malicious infrastructure.

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=automatic+transmission+gears+pdf
    • http://files.fflinstall.com/uploads/1/3/2/8/132814809/b39009c.pdf
    • http://files.artisanbuiltins.com/uploads/1/3/1/4/131483002/talegegogopa_zototavufuviz.pdf
    • http://files.kylekopko.com/uploads/1/3/1/0/131069808/6546017.pdf
    • https://cdn.shopify.com/s/files/1/0432/5595/5613/files/95330853507.pdf
    • https://cdn.shopify.com/s/files/1/0431/1885/4306/files/gopiropogalujunadedara.pdf
    • https://cdn.shopify.com/s/files/1/0429/0006/2371/files/rajimimenaf.pdf
    • https://cdn.shopify.com/s/files/1/0428/1984/6311/files/8566567215.pdf
    • https://cdn.shopify.com/s/files/1/0434/3077/2901/files/kovofivesusema.pdf
    • https://cdn.shopify.com/s/files/1/0431/4795/2294/files/46355019347.pdf
    • https://cdn.shopify.com/s/files/1/0427/9071/5548/files/89551999146.pdf
    • https://cdn.shopify.com/s/files/1/0434/8579/0365/files/raneruxerexelazosona.pdf
    • https://cdn.shopify.com/s/files/1/0438/1445/3410/files/46482924885.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/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000075a6.bin
f6bbc1397f6407b3912eb1fde9569261ab76d12c393854dabbdb473e1bc75299		 pdf-font-stream PDF embedded font (sfnt) at offset 0x75A6 5316 bytes
font_01_sfnt_off0000879b.bin
c80b0e1e498547ef20d23026d14e5d2078272d0272e1eab3c6b1964ad9012f5a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x879B 9864 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.