Malicious PDF — malware analysis report

Static analysis result for SHA-256 505d661c1367d268…

MALICIOUS

PDF

44.3 KB Created: 2020-08-25 11:12:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b8ea2fa0f626c23605baf8e5ebd4ccbb SHA-1: 5022b8b656fcf16fbdfc6fe98d57102c0c610533 SHA-256: 505d661c1367d26884c5d2058549ec0f145f343e68332a35e9cf1a7c61cec014
150 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 `https://ttraff.com/pify?keyword=dead+or+alive+english+movie+free`. This link is presented within the document body, disguised as a movie download lure. The document also contains a large number of embedded links, many pointing to Shopify domains, which is characteristic of SEO link farm techniques used to distribute malicious content. The ML classifier also strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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.com/pify?keyword=dead+or+alive+english+movie+free
    • http://files.seanpeinado.com/uploads/1/3/1/4/131453401/rizobovuzira-nogovodovi.pdf
    • http://files.pyonkotchi.com/uploads/1/3/2/6/132681634/berusajujefibunedul.pdf
    • https://cdn.shopify.com/s/files/1/0437/1080/8217/files/basecamp_manual.pdf
    • https://cdn.shopify.com/s/files/1/0434/3486/8897/files/zobozubizumevitili.pdf
    • https://cdn.shopify.com/s/files/1/0438/5076/0357/files/lajupa.pdf
    • https://cdn.shopify.com/s/files/1/0460/6518/9019/files/22206161327.pdf
    • https://cdn.shopify.com/s/files/1/0435/4736/1439/files/5495087395.pdf
    • https://cdn.shopify.com/s/files/1/0433/0936/7461/files/carol_of_the_bells_sheet_music_satb.pdf
    • https://cdn.shopify.com/s/files/1/0429/9299/2410/files/nobumubidufimupegased.pdf
    • https://cdn.shopify.com/s/files/1/0435/3451/6376/files/koxatasaluzixiludexagupu.pdf
    • https://cdn.shopify.com/s/files/1/0434/2690/6264/files/wagaxodugofuz.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_off00006e68.bin
00c2f932009556282eaca96a46b37e05177af522bcc8789e7a19685300fca973		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6E68 5380 bytes
font_01_sfnt_off00008095.bin
d75a9411a1ddb3976224436d1cf9fe59ec422ab18495d7a99b28de1842dfd5d6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8095 10560 bytes

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