Malicious PDF — malware analysis report

Static analysis result for SHA-256 730c5a69c6a748f2…

MALICIOUS

PDF

39.4 KB Created: 2020-08-25 02:48:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 321d0a889004186dd64495d7f0e89fbb SHA-1: 354a0e2fbe60370fcd93f597ccee19b5d6cfe86a SHA-256: 730c5a69c6a748f2140c03c65a8eeb9267b707feb571121d73680e7b29297e44
154 Risk Score

Malware Insights

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

The PDF document contains a deceptive title and numerous embedded links, many of which point to a link farm hosted on Shopify. One prominent link, 'https://ttraff.ru/pify?keyword=napoleon+bonaparte+video+guide', is flagged as a malicious redirector. The document's content, though heavily obfuscated, includes this URL and other PDF links, suggesting an attempt to drive traffic to potentially malicious sites.

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/pify?keyword=napoleon+bonaparte+video+guide
    • http://gozevi.lanctotsloveablesteddybears.com/uploads/1/3/1/8/131858530/rorevejuxevipoz.pdf
    • http://mokuta.southernwildproducts.com/uploads/1/3/1/8/131856979/jakeleb-tazavuk-xuzidututo.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0432/0513/2456/files/rixozegenir.pdf
    • https://cdn.shopify.com/s/files/1/0441/4255/9384/files/peperibofovu.pdf
    • https://cdn.shopify.com/s/files/1/0430/9496/6436/files/68770881956.pdf
    • https://cdn.shopify.com/s/files/1/0430/0495/2735/files/12547616161.pdf
    • https://cdn.shopify.com/s/files/1/0440/4989/1478/files/46820888687.pdf
    • https://cdn.shopify.com/s/files/1/0434/9224/5666/files/tinkers_construct_best_pickaxe_modifiers.pdf
    • https://cdn.shopify.com/s/files/1/0463/0249/4877/files/mobasarevuwajez.pdf
    • https://cdn.shopify.com/s/files/1/0436/9298/2427/files/zudataseperurur.pdf
    • https://cdn.shopify.com/s/files/1/0433/0792/5654/files/jexajotunupal.pdf
    • https://cdn.shopify.com/s/files/1/0432/5244/9435/files/5708177173.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_off00005d35.bin
c97161e8b4f9e1517a28c445c81d4cd7af0053efb1209c10f3066cd3f0e2dcef
pdf-font-stream PDF embedded font (sfnt) at offset 0x5D35 5120 bytes
font_01_sfnt_off00006ead.bin
1fbdccaec7931d840bd52f5241feab86fca2e85164ad29edf3ec85b1f1f10120
pdf-font-stream PDF embedded font (sfnt) at offset 0x6EAD 10084 bytes