Malicious PDF — malware analysis report

Static analysis result for SHA-256 bbbbbf9b9ad5ce1a…

MALICIOUS

PDF

41.3 KB Created: 2020-08-15 20:39:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3322e17d492fa1678cbd49c69e11f795 SHA-1: ca2730c893ad347b373762e08fb2343ab94beadb SHA-256: bbbbbf9b9ad5ce1af71d78b5d92a2485ee178ed0b5eca90b3c90d2df2b2a03bf
152 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.com, which is designed to lead users to further malicious content. The document body, though heavily obfuscated, contains the target URL, suggesting a lure to entice clicks. The presence of a large number of external PDF links, many hosted on Shopify, indicates a link farm designed to improve SEO for malicious content. The ML classifier also strongly flagged this PDF as malicious.

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.com/pify?keyword=wrist+exercises+arthritis+uk+pdf
    • http://filib.memphisdoula1.com/uploads/1/3/2/7/132740214/wurevezag_parawirodafode_dopido_lijituvodinim.pdf
    • http://jemamasu.voodoonlinehelp.com/uploads/1/3/1/8/131872303/rasaremudi_wufutibuxig_kigal_rexetelinu.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/44240048578.pdf
    • https://cdn.shopify.com/s/files/1/0433/7310/1219/files/xasoxev.pdf
    • https://cdn.shopify.com/s/files/1/0434/2156/5078/files/farimefumizupesisep.pdf
    • https://cdn.shopify.com/s/files/1/0428/8380/9439/files/87922397323.pdf
    • https://cdn.shopify.com/s/files/1/0433/0625/4494/files/71838099404.pdf
    • https://cdn.shopify.com/s/files/1/0448/2033/2705/files/diablo_3_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0434/6655/5556/files/64970678831.pdf
    • https://cdn.shopify.com/s/files/1/0428/2476/1510/files/arteriografia_femoral.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_off0000648a.bin
93d9dbd3688471293f354f2f5765439c91d675342e484a9f57a552704b1fce95		 pdf-font-stream PDF embedded font (sfnt) at offset 0x648A 5356 bytes
font_01_sfnt_off000076c9.bin
1786919b062df0b05c51fafbb2ca649266af352da9f242d431b415cadafb43c3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x76C9 10004 bytes

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