Malicious PDF — malware analysis report

Static analysis result for SHA-256 0c91bc630448950b…

MALICIOUS

PDF

36.0 KB Created: 2020-09-05 07:06:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 615320246a97049d3d5980fc4663630a SHA-1: 76bda7ebdc5df68fcf6676dd990afa6fb3deb302 SHA-256: 0c91bc630448950b70db58d9ffd4d99d584a1ef65053d3ea5d36ad65f2a5a8ec
154 Risk Score

Malware Insights

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

The PDF contains embedded links that point to a redirector URL, which is a common tactic for delivering malicious payloads or phishing pages. The ML classifier strongly indicated maliciousness, and the PDF structure suggests it's designed to appear as a useful document (address label template) to trick users into clicking the malicious link. No scripts were extracted, but the presence of the redirector and the ML score are strong indicators of 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.link/wix?keyword=avery+easy+peel+address+labels+template+5162
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/f3ecbe_3013244d6ce5412f9d3bc8f1cfc1ebcb.pdf
    • https://static.usrfiles.com/ugd/ec0012_87e283a8221f483190e91af01bf540eb.pdf
    • https://static.usrfiles.com/ugd/12dc78_2f36e8929b6746629407f99a6daa9a37.pdf
    • https://static.usrfiles.com/ugd/be5703_c0d0a8f43c2d4dc8a1f6dbe5c4589f68.pdf
    • https://static.usrfiles.com/ugd/b8c837_3bd5f229bb2d4ace8ce9d91a1189196a.pdf
    • https://static.usrfiles.com/ugd/ea2f88_a63fa0b957be4bdb9d5dce0878bebe45.pdf
    • https://static.usrfiles.com/ugd/227d0f_1626bd3084fd4b37a299cbe69b391c10.pdf
    • https://cdn.shopify.com/s/files/1/0456/4857/6679/files/60776115621.pdf
    • https://cdn.shopify.com/s/files/1/0433/4052/9816/files/55986192568.pdf
    • https://cdn.shopify.com/s/files/1/0433/9151/6826/files/buzosojesog.pdf
    • https://static.usrfiles.com/ugd/5438e3_4acfae0a988049b6b44de5212d5148cd.pdf
    • https://static.usrfiles.com/ugd/3aee12_569e3c3bc29e459ba85f54993289a128.pdf
    • https://static.usrfiles.com/ugd/9c58c5_2a26a071a6274090ae371e722a4bcc5e.pdf
    • https://static.usrfiles.com/ugd/3f80ec_e33c3733b4c048418c2dc3cfed0425cc.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_off00004ee5.bin
b43f75c4cfe2ce8735be6a9e16a154532f16fddab461e804128819d6101ad481
pdf-font-stream PDF embedded font (sfnt) at offset 0x4EE5 5860 bytes
font_01_sfnt_off000062d4.bin
18f4ab6e534f4eba2aeefe82d00daa3d49d459c359d9e6e27ec39dfaaecc5a69
pdf-font-stream PDF embedded font (sfnt) at offset 0x62D4 9448 bytes