Malicious PDF — malware analysis report

Static analysis result for SHA-256 aded0538ffe93eab…

MALICIOUS

PDF

36.3 KB Created: 2020-09-05 12:53:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0aec9b7387a7cd297bf7bc29d43c6e76 SHA-1: 848fc27405026669c8778148f0851ddc41b71922 SHA-256: aded0538ffe93eabf15119972d4a2581a097efc6f5701e03f63662d1cf4a4059
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.link, which is disguised as a "Cassiopeia lol guide". This indicates a social engineering lure to direct the user to malicious content. The PDF also hosts a large number of external PDF links, many pointing to Shopify, suggesting a link farm for SEO manipulation or distribution. The ML classifier 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.link/pify?keyword=cassiopeia+lol+guide
    • https://cdn.shopify.com/s/files/1/0430/1553/6793/files/gudutifawukol.pdf
    • https://cdn.shopify.com/s/files/1/0433/4849/2438/files/tufebaluxiwinosigura.pdf
    • https://cdn.shopify.com/s/files/1/0437/0844/8919/files/high_performance_polyurethane_water_based_topcoat.pdf
    • https://cdn.shopify.com/s/files/1/0436/1384/7710/files/35357187336.pdf
    • https://cdn.shopify.com/s/files/1/0440/9799/4904/files/zibalaguzir.pdf
    • https://static.usrfiles.com/ugd/04e6f9_f1d08ebc97ec491a942a1f658ed3eb34.pdf
    • https://static.usrfiles.com/ugd/b8c837_d1edcb8a83c94dfea2c829b95e17ac54.pdf
    • https://static.usrfiles.com/ugd/98e298_48c5e4b51b2744b8acdd4a17a7a334e8.pdf
    • https://static.usrfiles.com/ugd/f967ac_4e80cb57bf09409297c2643eb5d238e2.pdf
    • https://static.usrfiles.com/ugd/94e5ef_65d4cc9a776040428d2012318b696aeb.pdf
    • https://static.usrfiles.com/ugd/de60da_c0631021b50442fab8eb379a1daf1722.pdf
    • https://static.usrfiles.com/ugd/8aba0c_be8e6d675f0f439d82bf7c8ec4733171.pdf
    • https://static.usrfiles.com/ugd/2072cd_95765becdf3a407dbe1f332ae0f1ffdf.pdf
    • https://static.usrfiles.com/ugd/e66789_5d1b07b0f2fb4c4180f9b10127606522.pdf
    • https://static.usrfiles.com/ugd/912de2_677a54e9b2124cdc89734f89c143d99a.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_off000050c9.bin
b57e32e89b44adaa52a4b1dc4c4f6c651185d72c348cff87ee2aed2f66f7b2c7
pdf-font-stream PDF embedded font (sfnt) at offset 0x50C9 4936 bytes
font_01_sfnt_off000061a3.bin
be839b793948fbfb91315b51dbe39d1bfddbbe1dc99999394e916351b0b54772
pdf-font-stream PDF embedded font (sfnt) at offset 0x61A3 10332 bytes