Malicious PDF — malware analysis report

Static analysis result for SHA-256 09a1f3680a412c05…

MALICIOUS

PDF

42.5 KB Created: 2020-08-15 07:17:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 15a453056e51cc6d0d37a86470c9ca6f SHA-1: 50fb932995d90e0f091540abf97d253a79d7e427 SHA-256: 09a1f3680a412c05993044a73cdbf3ebd83ae0347e601b32c9230ddee2ffca73
154 Risk Score

Malware Insights

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

The PDF contains a link farm pointing to numerous Shopify-hosted PDFs, with one primary link leading to a malicious redirector. The document body, though heavily obfuscated, contains the URL 'https://ttraff.cc/pify?keyword=cute+printable+calendar+template+2019', which is flagged as a malicious redirector. This suggests the document is designed to trick users into clicking the link, likely to download a malicious payload or phish for credentials.

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/pify?keyword=cute+printable+calendar+template+2019
    • http://jixasaxe.strivetriclub.com/uploads/1/3/0/8/130874683/a9030e0.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0432/4347/1003/files/17309950886.pdf
    • https://cdn.shopify.com/s/files/1/0430/7664/9124/files/41159057152.pdf
    • https://cdn.shopify.com/s/files/1/0438/5187/4466/files/33542975844.pdf
    • https://cdn.shopify.com/s/files/1/0433/2814/3510/files/xeniwumesufimutep.pdf
    • https://cdn.shopify.com/s/files/1/0434/5082/6905/files/85619936121.pdf
    • https://cdn.shopify.com/s/files/1/0429/2637/5071/files/castle_crashers_best_weapon.pdf
    • https://cdn.shopify.com/s/files/1/0434/6681/7689/files/pedigajulewaredurixudiv.pdf
    • https://cdn.shopify.com/s/files/1/0430/6108/4322/files/hands_on_blockchain_with_hyperledger.pdf
    • https://cdn.shopify.com/s/files/1/0431/6151/8231/files/86962245955.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_off0000684b.bin
9ca3bc7bf3bacaa20957670e08811ec35e049f792b64a06285e8a40354d72de1
pdf-font-stream PDF embedded font (sfnt) at offset 0x684B 5568 bytes
font_01_sfnt_off00007b1d.bin
25fd694b0c0c7f2ec36fe71dbb521d184f2a154a5e36f1817aff78def5c43789
pdf-font-stream PDF embedded font (sfnt) at offset 0x7B1D 10120 bytes