Malicious PDF — malware analysis report

Static analysis result for SHA-256 15395d56220d797a…

MALICIOUS

PDF

36.7 KB Created: 2020-08-29 21:02:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 599b70fa5bd9219c14cd69224b69bf54 SHA-1: f035ee4e31e411fc3da10437251ee59350ec8bcc SHA-256: 15395d56220d797acda7ef38859a80419db6a371ea329eb9edd1d8e1a76f847c
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 'https://ttraff.com/wix?keyword=reasonable+doubt+itunes+zip'. The ML classifier strongly flagged this PDF as malicious, and the presence of numerous external PDF links suggests a link farm or SEO poisoning attempt. The document body, though heavily obfuscated, contains the malicious URL and references to other PDFs, reinforcing the malicious intent.

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=reasonable+doubt+itunes+zip
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/b8c837_39b8b4365f7e4d7295fc93e10f219f40.pdf
    • https://static.usrfiles.com/ugd/b8c837_6a002341c7854b5e9ed481ca12bec94e.pdf
    • https://static.usrfiles.com/ugd/b8c837_1194370f7fe24c9aae7dbc812492f2fd.pdf
    • https://static.usrfiles.com/ugd/3cb679_9a967f378fc548829c28985d8b6148d6.pdf
    • https://static.usrfiles.com/ugd/ea9bdf_20cdec03abab46cf9e5319c437bae2b1.pdf
    • https://static.usrfiles.com/ugd/b8c837_c97d650ad7d44f28b86e8513a051f3d3.pdf
    • https://static.usrfiles.com/ugd/b8c837_3497fbb4d27147b6ab86ef5af480a36d.pdf
    • https://static.usrfiles.com/ugd/b8c837_6fb30e0e92f4478ca04f1c38d6a0d4a5.pdf
    • https://static.usrfiles.com/ugd/b8c837_d432e32bd3b54e0988582ef2b3f4adce.pdf
    • https://cdn.shopify.com/s/files/1/0428/9078/9027/files/44767215864.pdf
    • https://cdn.shopify.com/s/files/1/0443/0485/9292/files/lakirigexilagekikipu.pdf
    • https://cdn.shopify.com/s/files/1/0434/3191/9765/files/33505404904.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_off00005193.bin
7de57309fcba2ec84d06a54bc229bd1eb77683749fb01acfd935d7554ddcfa0f
pdf-font-stream PDF embedded font (sfnt) at offset 0x5193 5052 bytes
font_01_sfnt_off000062d9.bin
232fea03a0860a6682bd82fe1176595e0fa66ea0009fadb6eab460b9a194600a
pdf-font-stream PDF embedded font (sfnt) at offset 0x62D9 10416 bytes