Malicious PDF — malware analysis report

Static analysis result for SHA-256 ca85e9ba4f0ae976…

MALICIOUS

PDF

56.1 KB Created: 2020-08-30 22:25:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 111d38c31b72291289c27af6ad2d971e SHA-1: 8f051ab9960ebff501b681453c996b3b10802ce6 SHA-256: ca85e9ba4f0ae976b35aac738d24c1890ae4062142a449b8dd8a89bc7130db85
152 Risk Score

Malware Insights

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

The PDF file was flagged by a critical heuristic for linking to known malicious redirector infrastructure. Additionally, another critical heuristic identified it as part of a PDF link farm, with numerous external links. The ML classifier also strongly indicated maliciousness. The embedded document body, though heavily corrupted, contains the URL https://ttraff.club/wix?keyword=tiers+list+battlerite, which is the primary indicator of malicious intent, likely serving as a lure for phishing or malware delivery.

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.club/wix?keyword=tiers+list+battlerite
    • https://static.usrfiles.com/ugd/fe83c3_70e9b444909b4fc3b60cd112f1dc9205.pdf
    • https://static.usrfiles.com/ugd/3e9e83_9389a409b08e4917a2bbe853057a0472.pdf
    • https://static.usrfiles.com/ugd/b8c837_03fabe0c4f734b85b60c8473cbeac064.pdf
    • https://cdn.shopify.com/s/files/1/0435/2786/4469/files/manovumonakemibe.pdf
    • https://static.usrfiles.com/ugd/d54300_19660e8cbfac4ce7a7e920b12685c5c3.pdf
    • https://static.usrfiles.com/ugd/97634b_24535f0bad00452d80e83b348e62effc.pdf
    • https://static.usrfiles.com/ugd/b8c837_d4e60a866d5641c7a107ae86a43722e5.pdf
    • https://cdn.shopify.com/s/files/1/0434/7602/5497/files/29294435621.pdf
    • https://cdn.shopify.com/s/files/1/0436/9619/3686/files/giwexipiwas.pdf
    • https://cdn.shopify.com/s/files/1/0462/9882/4864/files/kekasixanefuripu.pdf
    • https://cdn.shopify.com/s/files/1/0432/0142/9662/files/kutad.pdf
    • https://cdn.shopify.com/s/files/1/0430/6078/9409/files/cancer_de_boca.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_off00005efb.bin
281556aa7b848521ec0bf4cefff0df4a2a77e15e685b81116610f46e5c9dd0d0
pdf-font-stream PDF embedded font (sfnt) at offset 0x5EFB 20424 bytes
font_01_sfnt_off0000a036.bin
23b191d3a65692692456978a9320bfdabfea520d2caf6986fc91deeb5d81e05c
pdf-font-stream PDF embedded font (sfnt) at offset 0xA036 4768 bytes
font_02_sfnt_off0000b06d.bin
03f135d2ff886061b596717821cd69f3fc6b4bdc15f84898d69f8ead5fa90d6e
pdf-font-stream PDF embedded font (sfnt) at offset 0xB06D 10272 bytes