Malicious PDF — malware analysis report

Static analysis result for SHA-256 127119147c14d76b…

MALICIOUS

PDF

63.1 KB Created: 2020-08-31 15:02:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a858158747dfb7c37ebfd8dbaf736efb SHA-1: c5e61ea8ec7a73b1a0bf45bd1d1968e970b290cc SHA-256: 127119147c14d76b8236f99d2d8f5e08b6793f96676f7c4b965056b8351f8865
154 Risk Score

Malware Insights

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

This PDF file contains embedded links that redirect to malicious infrastructure, specifically a URL designed to lure users with the promise of a free admin template. The PDF_MALICIOUS_REDIRECTOR_LINK heuristic confirms the malicious nature of the target URL. Additionally, the PDF_SEO_LINK_FARM heuristic indicates a large number of outbound links, suggesting a link farm or spamming operation. The ML classifier also strongly indicates maliciousness.

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.ru/wix?keyword=html5+css3+responsive+admin+template+free
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0435/0692/5720/files/wozav.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/32377204601.pdf
    • https://cdn.shopify.com/s/files/1/0434/3654/0056/files/renaxozijejexuka.pdf
    • https://cdn.shopify.com/s/files/1/0433/6173/0719/files/naya_rivera_sorry_not_sorry_audiobook.pdf
    • https://cdn.shopify.com/s/files/1/0437/0454/9531/files/40686221426.pdf
    • https://cdn.shopify.com/s/files/1/0431/4506/8699/files/myanmar_new_books_free.pdf
    • https://static.usrfiles.com/ugd/b8c837_92a9a8818da742069e763b7a136ede4c.pdf
    • https://static.usrfiles.com/ugd/b8c837_0e89944775ce4cac9cbbc9645d74763d.pdf
    • https://static.usrfiles.com/ugd/7c3584_29f672a695ff42a0ba3a83bafa5e9c07.pdf
    • https://static.usrfiles.com/ugd/003b86_0e80ce115fff466991b1563925d93543.pdf
    • https://cdn.shopify.com/s/files/1/0439/3664/5275/files/18067046327.pdf
    • https://cdn.shopify.com/s/files/1/0434/5279/2982/files/27212983901.pdf
    • https://cdn.shopify.com/s/files/1/0439/1793/4747/files/the_dark_lemony_snicket.pdf
    • https://cdn.shopify.com/s/files/1/0450/6147/2419/files/69587408283.pdf
    • https://cdn.shopify.com/s/files/1/0437/0428/7383/files/wefebanuzilifig.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_off0000b88a.bin
f15dc0e04f37bf5870b0ad00a2a609258f41a15b60ad42ca9bfbc3633dea073b
pdf-font-stream PDF embedded font (sfnt) at offset 0xB88A 5612 bytes
font_01_sfnt_off0000cb90.bin
27eb4b8ffbf78d050b032e77f8ae5d4fb542f68c86f0b106707947f54060176c
pdf-font-stream PDF embedded font (sfnt) at offset 0xCB90 10380 bytes