Malicious PDF — malware analysis report

Static analysis result for SHA-256 3c49c56837fbe602…

MALICIOUS

PDF

55.9 KB Created: 2020-08-29 17:55:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 308d0f049afccf906c03cab4fc3c2536 SHA-1: e7c9354b94ed74f73b6f5f97d06ef23d26b151e9 SHA-256: 3c49c56837fbe602bd670a6d0392867228c78336a774d86072bd891a3596a341
152 Risk Score

Malware Insights

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

The PDF was flagged as malicious due to a critical heuristic identifying it as a redirector link to known malicious infrastructure. It also contains a large number of external PDF links, characteristic of a link farm. The embedded URL 'https://ttraff.com/wix?keyword=the+giver+chapter+13+pdf' is the primary indicator of malicious intent, likely serving as a lure or a gateway to further malicious content.

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/wix?keyword=the+giver+chapter+13+pdf
    • https://static.usrfiles.com/ugd/accd1f_c57d4dbc182b422791b1c1cd6e78e951.pdf
    • https://static.usrfiles.com/ugd/b8c837_5986915969f74969a5492d46c90c2f72.pdf
    • https://static.usrfiles.com/ugd/b8c837_1cd81dc27d2d4ab3a7601226f188ad43.pdf
    • https://cdn.shopify.com/s/files/1/0437/0015/8629/files/bali_map_tourist.pdf
    • https://cdn.shopify.com/s/files/1/0434/4764/8406/files/kapitojiduvidawinesif.pdf
    • https://cdn.shopify.com/s/files/1/0433/2745/5382/files/20309567668.pdf
    • https://cdn.shopify.com/s/files/1/0439/8520/7454/files/95547169061.pdf
    • https://cdn.shopify.com/s/files/1/0432/9183/6566/files/gadafobe.pdf
    • https://cdn.shopify.com/s/files/1/0429/0327/3628/files/36200539565.pdf
    • https://cdn.shopify.com/s/files/1/0434/3624/5144/files/pufexiguja.pdf
    • https://static.usrfiles.com/ugd/b8c837_a1c8e0aa06f8420399027d1e12471151.pdf
    • https://static.usrfiles.com/ugd/b8c837_61e119bca487421284204987d34357d4.pdf
    • https://static.usrfiles.com/ugd/1f2646_110956fd76ad4194ad96ea60471c0d21.pdf
    • https://static.usrfiles.com/ugd/b8c837_cfd30181caeb4833b699857a028f5062.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000085ad.bin
3a595f4dc5dc6665e86c836c639e937cfdbbc16383fd2b9517da19014768f5a3
pdf-font-stream PDF embedded font (sfnt) at offset 0x85AD 5432 bytes
font_01_sfnt_off00009836.bin
4cd1280a6cc8cb087d87825a7b973904613371f27d3b49a36a2fa8ac0ed1f653
pdf-font-stream PDF embedded font (sfnt) at offset 0x9836 10548 bytes
font_02_sfnt_off0000bc78.bin
bf8f9ece8d9d74ce2d7a98a07ee1bb8f4056faf702b3b1702118181e85f1b939
pdf-font-stream PDF embedded font (sfnt) at offset 0xBC78 16312 bytes