Malicious PDF — malware analysis report

Static analysis result for SHA-256 157feeb6c0e2a300…

MALICIOUS

PDF

54.4 KB Created: 2020-09-02 05:23:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b8833f9ba881f961dcbfbf44d0cea378 SHA-1: eaa896b990afa7398854ec8f15e2fa318340b99f SHA-256: 157feeb6c0e2a30007c638edf8206f30a1f93dc7b751f95a5e20e874c1b47c1b
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links, with one critical heuristic identifying it as a redirector to malicious infrastructure. The embedded URL, 'https://ttraff.cc/wix?keyword=types+of+telemetry+system+pdf', is directly linked to this malicious activity. The ML classifier also strongly indicated maliciousness. The document body, though heavily obfuscated, contains the same URL, reinforcing the phishing or scam lure.

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.cc/wix?keyword=types+of+telemetry+system+pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/3aee12_3e4aaa931c1a45808db53cc0364d9fe8.pdf
    • https://static.usrfiles.com/ugd/97634b_ef85fcf671f64224bc36cd8257e21b00.pdf
    • https://static.usrfiles.com/ugd/89c6ad_989073848aa54ed1a1d8b6a93c0ea50d.pdf
    • https://static.usrfiles.com/ugd/0e2875_f8c9bbfd47a8407cb17734413665dd2d.pdf
    • https://static.usrfiles.com/ugd/0251f0_b67aa29371c04159b38af8d28ddce3b1.pdf
    • https://static.usrfiles.com/ugd/63d3ad_fa5095c8b16f4c6e99cae00179607cde.pdf
    • https://static.usrfiles.com/ugd/b8c837_28659cd01f1f4b75b434e49e3ee1b8be.pdf
    • https://static.usrfiles.com/ugd/c12414_be12f6eb28204aa99f5d66bec5187972.pdf
    • https://static.usrfiles.com/ugd/d5415a_86ec1db86fa24daf899acc14f65e19fd.pdf
    • https://static.usrfiles.com/ugd/b8c837_3c00d0d0797c4653b174009bcae3e607.pdf
    • https://static.usrfiles.com/ugd/b8c837_73f27eb718514f14964a172096bfde1c.pdf
    • https://static.usrfiles.com/ugd/b8c837_0a42262263df4cbd8bf878a3eda5f33c.pdf
    • https://static.usrfiles.com/ugd/b8c837_f34215f092ac48278fae250fb24fbc18.pdf
    • https://static.usrfiles.com/ugd/21e6f2_a35532a1f1364c34af999e45a9fec598.pdf
    • https://static.usrfiles.com/ugd/4c1554_f1fae7eec0b64ec29883116b00a64392.pdf
    • https://static.usrfiles.com/ugd/9a242c_404b031ac4914cf0b32d5e09b7c8c90d.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_off000098c2.bin
87d5a5237ad10c05a45d197844031acda816170b81e38537d6944f000bf769f1
pdf-font-stream PDF embedded font (sfnt) at offset 0x98C2 5028 bytes
font_01_sfnt_off0000a9d4.bin
a736894063607395621082c5b71ced9ac9a5ee69edd8547f9d8b045ac2de9db1
pdf-font-stream PDF embedded font (sfnt) at offset 0xA9D4 10104 bytes