Malicious PDF — malware analysis report

Static analysis result for SHA-256 6096ed92cfea1d42…

MALICIOUS

PDF

41.1 KB Created: 2020-08-29 20:45:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f1a0807f468ffa9d13eb309f59ba5bdb SHA-1: fae4ce21264ae9df0be0a32b90634e00c5789042 SHA-256: 6096ed92cfea1d42145afaf9a9569c8b3565ce0904e3041707f56e22f3e66ecd
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains embedded links, with one specifically identified as a malicious redirector pointing to 'ttraff.com'. The heuristic 'PDF_MALICIOUS_REDIRECTOR_LINK' confirms this, and the ML classifier strongly indicates maliciousness. The document body, though heavily obfuscated, contains the same suspicious URL, suggesting an attempt to trick the user into navigating to a potentially harmful site.

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+many+loves+of+hercules
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/b8c837_a6c34eea607d423bbeb400693806f6c4.pdf
    • https://static.usrfiles.com/ugd/41a0b6_d3f1ec3da33f40e8a5a31f6395cd9ed3.pdf
    • https://static.usrfiles.com/ugd/ea9bdf_94587cd520e6449dba7a8205bb2670d8.pdf
    • https://static.usrfiles.com/ugd/67f5f7_ddc6fed045f445e6a2a457e87eb60b3b.pdf
    • https://static.usrfiles.com/ugd/b8c837_62e8dabb33c44878b688fbbec30ba2a1.pdf
    • https://cdn.shopify.com/s/files/1/0437/5294/7863/files/zijuxotipe.pdf
    • https://cdn.shopify.com/s/files/1/0430/8919/9268/files/sony_4k_android_tv_55_inch.pdf
    • https://cdn.shopify.com/s/files/1/0427/8976/5276/files/mejalukelisuzukutapo.pdf
    • https://cdn.shopify.com/s/files/1/0431/2091/8679/files/36469084278.pdf
    • https://static.usrfiles.com/ugd/b8c837_fba0567a109a46a6868974efd7aa2b5e.pdf
    • https://static.usrfiles.com/ugd/b8c837_e4c74ce23ce048c8a561d8482d1d311c.pdf
    • https://static.usrfiles.com/ugd/af0aa9_685b4c0768de4fd891b4d3db7674c21c.pdf
    • https://static.usrfiles.com/ugd/429b25_78f9c0dba91b475298dea643f37f8298.pdf
    • https://static.usrfiles.com/ugd/b8c837_034fe068f00c4feab4e6424493976977.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_off0000634a.bin
16042fb088dcaf7401759867126a26018edb2fcc3cf12610e98093d5c3fc978d
pdf-font-stream PDF embedded font (sfnt) at offset 0x634A 5232 bytes
font_01_sfnt_off000074fd.bin
3cc91b42d716a556262f8314bd47aef8b5b5ef3fe8ae96578ffdc43d1e769760
pdf-font-stream PDF embedded font (sfnt) at offset 0x74FD 10144 bytes