Malicious PDF — malware analysis report

Static analysis result for SHA-256 74026f24efc4557d…

MALICIOUS

PDF

40.9 KB Created: 2020-08-30 21:00:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d7a3d45a40728139cd302931b4902e16 SHA-1: fe1e505d1dff672b09d59a7b63502cd40a8c4e3a SHA-256: 74026f24efc4557dc7c8c689330dc75714395b5bdfd2ab0c7851ce2e84036f7b
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded links, with a critical heuristic firing for PDF_MALICIOUS_REDIRECTOR_LINK pointing to ttraff.com. Another critical heuristic, PDF_SEO_LINK_FARM, indicates a large number of external PDF links, suggesting a link farm. The ML classifier also strongly flagged this PDF as malicious. The document body, though heavily obfuscated, contains the primary malicious URL.

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=glass+cannon+binding+of+isaac
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/b8c837_cdcc88a9e53540729b17c7be104fcc79.pdf
    • https://static.usrfiles.com/ugd/451461_6a60ce2e1098492a92c803b35b30180f.pdf
    • https://static.usrfiles.com/ugd/b8c837_338bf714bd0e413a9b92497faf5273bb.pdf
    • https://cdn.shopify.com/s/files/1/0432/2502/2621/files/baxavegemewaguna.pdf
    • https://static.usrfiles.com/ugd/3fc21f_c060b3a6f649472584ccfc59349235d7.pdf
    • https://static.usrfiles.com/ugd/b8c837_1669f77a8efc4cfb815a8570660e00f2.pdf
    • https://static.usrfiles.com/ugd/b8c837_6fde20de732f4948909f569345c69715.pdf
    • https://static.usrfiles.com/ugd/4c1554_be5ed3bd278f49739d0d9d185e6b61e4.pdf
    • https://static.usrfiles.com/ugd/b8c837_ee0a549f8692443f815821bb22e3288c.pdf
    • https://cdn.shopify.com/s/files/1/0437/1261/0457/files/2620030125.pdf
    • https://cdn.shopify.com/s/files/1/0438/6878/2757/files/body_systems_list.pdf
    • https://cdn.shopify.com/s/files/1/0463/6829/3019/files/bokazitatoraweg.pdf
    • https://cdn.shopify.com/s/files/1/0434/8909/9938/files/36632943158.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006262.bin
ab5f408d5445fcaa36b5bb6e16ca9ca641ce18731679198dc26bf464728bc73c
pdf-font-stream PDF embedded font (sfnt) at offset 0x6262 5264 bytes
font_01_sfnt_off0000745e.bin
6cc0fe11aa919712f02f17146204b6fc50e143069b32bb477022d445cd371772
pdf-font-stream PDF embedded font (sfnt) at offset 0x745E 10236 bytes