Malicious PDF — malware analysis report

Static analysis result for SHA-256 63a9511088f837a6…

MALICIOUS

PDF

39.3 KB Created: 2020-09-01 23:49:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 41f2fb73c149e82667977832b62850f0 SHA-1: 78dfb4420f40e2cfe6c9cfc4b12faa4b24ead3ad SHA-256: 63a9511088f837a60cc6cda7266818a2ffa8696905ad397b4d1acb6070bb6fba
154 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, disguised with a plausible lure about a 'battle net installer' issue. The document body, though heavily obfuscated, contains this URL and other links to what appears to be a link farm, suggesting a phishing or malware distribution attempt. The ML classifier strongly supports the malicious verdict.

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=battle+net+installer+stuck+ing+new+files
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/b8c837_1638111e37bd4c80b3b30bbc8a6ccb82.pdf
    • https://static.usrfiles.com/ugd/b8c837_fdd3d76c3f8547e69e103a70e265f844.pdf
    • https://static.usrfiles.com/ugd/b8c837_3550015dc2e24113b0ed133b7fdf5ab6.pdf
    • https://static.usrfiles.com/ugd/5438e3_366c60a043464021b0768f02391f3675.pdf
    • https://cdn.shopify.com/s/files/1/0431/7252/8292/files/13175859290.pdf
    • https://cdn.shopify.com/s/files/1/0430/8133/4951/files/12486306371.pdf
    • https://cdn.shopify.com/s/files/1/0430/6678/5949/files/nureboni.pdf
    • https://cdn.shopify.com/s/files/1/0430/1769/9477/files/fabuzasewibisegole.pdf
    • https://static.usrfiles.com/ugd/0d089b_079e276cfbf64b108fbef852fe9852b9.pdf
    • https://static.usrfiles.com/ugd/253000_353d4f3e4bf94f26a37c80c1171dd781.pdf
    • https://static.usrfiles.com/ugd/227d0f_7e93eff7a9f6443b976f9ff368d79fd8.pdf
    • https://cdn.shopify.com/s/files/1/0444/4015/8374/files/efectos_del_alcohol_en_adolescentes.pdf
    • https://cdn.shopify.com/s/files/1/0428/9203/4211/files/14585347606.pdf
    • https://cdn.shopify.com/s/files/1/0432/3491/8558/files/ratinekelegozupowalelarib.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_off00005b75.bin
73ec8e8c98bae2f5fb1bc5fe66ec798e06c7d729a2ede3dbdaf6138c44ffacca
pdf-font-stream PDF embedded font (sfnt) at offset 0x5B75 5252 bytes
font_01_sfnt_off00006d7a.bin
ef5900e7cc59d26f7635cf58d190f4a4d0b304995d9fd53be962d2e2e2192355
pdf-font-stream PDF embedded font (sfnt) at offset 0x6D7A 10260 bytes