Malicious PDF — malware analysis report

Static analysis result for SHA-256 4d269c46164da252…

MALICIOUS

PDF

32.5 KB Created: 2020-08-23 05:44:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a1c2e25df334b16f64dccd150e67e291 SHA-1: 6464e92b82fc582dde630714359c3ef5747634f9 SHA-256: 4d269c46164da2528e8a1323f4a1c4f8173ae01be71b572eaf4a9e4a2d9466a0
150 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to a link farm hosted on Shopify. One of the primary links, however, redirects to a malicious URL (ttraff.cc) disguised as an answer key for 'Casey at the Bat'. This suggests a social engineering attack aimed at tricking users into visiting a malicious site. The ML classifier strongly supports the malicious nature of this PDF.

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.cc/pify?keyword=casey+at+the+bat+answers+key
    • http://vefol.markalldridge.co.uk/uploads/1/3/1/0/131070805/5490747.pdf
    • https://cdn.shopify.com/s/files/1/0436/0224/7838/files/datusoworikuzuru.pdf
    • https://cdn.shopify.com/s/files/1/0447/4303/2981/files/62073787566.pdf
    • https://cdn.shopify.com/s/files/1/0430/2965/9805/files/julubivej.pdf
    • https://cdn.shopify.com/s/files/1/0434/0721/2694/files/wudesibude.pdf
    • https://cdn.shopify.com/s/files/1/0436/4589/4816/files/iphone_11_pro_user_guide.pdf
    • https://cdn.shopify.com/s/files/1/0434/5161/3334/files/come_on_eileen_save_ferris_sheet_music.pdf
    • https://cdn.shopify.com/s/files/1/0438/5813/3152/files/25186952889.pdf
    • https://cdn.shopify.com/s/files/1/0429/1824/8601/files/woxefakudilofemibevefoku.pdf
    • https://cdn.shopify.com/s/files/1/0433/0940/0214/files/69317316963.pdf
    • https://cdn.shopify.com/s/files/1/0431/6450/0122/files/sanagiboruwe.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_off0000455c.bin
6e2d3d45bc1697ac32f215b028c0fc7bb5124c7b6da65c531b72287a3cb40fdf		 pdf-font-stream PDF embedded font (sfnt) at offset 0x455C 5044 bytes
font_01_sfnt_off00005683.bin
c458efe01a00b6afd47d33b76c85ad422887634d42e9a8954794365c946d22b5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5683 9124 bytes

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