Malicious PDF — malware analysis report

Static analysis result for SHA-256 f92dc8fec6bdc9ac…

MALICIOUS

PDF

71.9 KB Created: 2020-08-04 08:43:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8e7d0ca53def797ab7c76f31cd26d31a SHA-1: 1f848155e1eb098e5626effd819724d94ec5a933 SHA-256: f92dc8fec6bdc9ac7c0a18fe0c3209cd2c364d92cd4191737ec7f770892606ad
120 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one heuristic specifically identifying a link to a known malicious redirector infrastructure at 'https://ttraff.ru/pify?keyword=regimento+da+assembleia+da+republica+de+mocambique+pdf'. Another heuristic flagged a large number of external PDF links, suggesting a link farm or SEO abuse tactic. The document body, though heavily obfuscated, contains the same URL, reinforcing the malicious intent. No scripts were extracted from this sample.

Heuristics 3

  • 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.
  • 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=regimento+da+assembleia+da+republica+de+mocambique+pdf
    • http://files.shadysideofthetracks.com/uploads/1/3/0/7/130776822/d64a041bb35aa.pdf
    • http://files.porterrc.com/uploads/1/3/1/3/131398526/4035958.pdf
    • http://files.jenniferframpton.com/uploads/1/3/0/7/130776822/9118705.pdf
    • http://files.skyleblanc.com/uploads/1/3/1/6/131637034/sabosutukitikusuwiw.pdf
    • http://files.finalfinishdetailing.com/uploads/1/3/2/7/132710655/levin_linebedanelu_vidaki_vukadidi.pdf
    • https://cdn.shopify.com/s/files/1/0440/8626/3960/files/what_is_cracked_minecraft.pdf
    • https://cdn.shopify.com/s/files/1/0434/3696/6055/files/10107594654.pdf
    • https://cdn.shopify.com/s/files/1/0439/1596/8667/files/pajototijexu.pdf
    • https://cdn.shopify.com/s/files/1/0434/2880/6806/files/86754489752.pdf
    • https://cdn.shopify.com/s/files/1/0433/7070/9142/files/xawukemigazadexefofoji.pdf
    • https://cdn.shopify.com/s/files/1/0433/0507/4838/files/5878648594.pdf
    • https://cdn.shopify.com/s/files/1/0429/3325/6345/files/23982919549.pdf
    • https://cdn.shopify.com/s/files/1/0431/4864/0418/files/riwarokidavonidedomerumuw.pdf
    • https://cdn.shopify.com/s/files/1/0436/4691/0617/files/98310829466.pdf
    • https://cdn.shopify.com/s/files/1/0431/6718/7108/files/58795599889.pdf
    • https://cdn.shopify.com/s/files/1/0432/7096/3350/files/3395823442.pdf
    • https://cdn.shopify.com/s/files/1/0427/6341/9814/files/3177492625.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_off0000d635.bin
5507b14240430e347cf5af7e3e54ffa68f48803bd3363aaf2be2aec292ab9133
pdf-font-stream PDF embedded font (sfnt) at offset 0xD635 5748 bytes
font_01_sfnt_off0000e9a4.bin
7e0a564e2903719039fd01f3f7b5e1b61e9fc5655904bfc7a0f3a26c17d22329
pdf-font-stream PDF embedded font (sfnt) at offset 0xE9A4 12888 bytes