Malicious PDF — malware analysis report

Static analysis result for SHA-256 15a07b3210e6e949…

MALICIOUS

PDF

42.1 KB Created: 2020-08-30 04:15:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c26087bddd32e684d5890c0e95de5916 SHA-1: fc73bc795c7e3e9f92bc67055c98da37a8b8b19b SHA-256: 15a07b3210e6e949f3808094bffce0bdfcea396f65aa6de934c0994c7967c29a
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to Shopify domains hosting seemingly benign PDFs. However, one critical link redirects to 'ttraff.com', a known malicious redirector. The ML classifier also strongly flagged this PDF as malicious. The presence of embedded URLs and the redirection to a malicious domain suggest an attempt to lead the user to a compromised site, likely for further exploitation or credential harvesting.

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=fallout+white+legs
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0438/3444/1885/files/uninstall_node._js_mac.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/67142307476.pdf
    • https://cdn.shopify.com/s/files/1/0446/9473/2953/files/cytology_download.pdf
    • https://static.usrfiles.com/ugd/cafc24_3e1bcfc4c8dd4605a1c408cbf00bdee6.pdf
    • https://static.usrfiles.com/ugd/3826db_d1aaaf8d5d484efd8c087e0868ef5c26.pdf
    • https://static.usrfiles.com/ugd/299074_432f82e14cb44a9c910ed80d707d56bc.pdf
    • https://cdn.shopify.com/s/files/1/0432/3013/4427/files/zafilal.pdf
    • https://cdn.shopify.com/s/files/1/0438/7074/8827/files/all_formulas_of_atomic_structure_class_11.pdf
    • https://cdn.shopify.com/s/files/1/0431/1479/1069/files/27758846216.pdf
    • https://cdn.shopify.com/s/files/1/0433/2489/9496/files/vukedubefeliwetoluj.pdf
    • https://static.usrfiles.com/ugd/432b07_172ee7b38ded4eeb904e259e3b5750ff.pdf
    • https://static.usrfiles.com/ugd/b8c837_1426225cefd9417493bf0331e6b88b03.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_off0000679c.bin
64bb7371539ccca7cc3a0fc41d80a64b6a51b89a1813968eac338f25925067c6
pdf-font-stream PDF embedded font (sfnt) at offset 0x679C 4900 bytes
font_01_sfnt_off0000785b.bin
98e0038acabba9ac0f468510d4af4d499e09917c39a8baff0b128f22c5c291e6
pdf-font-stream PDF embedded font (sfnt) at offset 0x785B 10348 bytes