Malicious PDF — malware analysis report

Static analysis result for SHA-256 17fba0cbc9bcda11…

MALICIOUS

PDF

43.1 KB Created: 2020-08-24 11:50:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 188d35bee18f9b7bead535cc454046fd SHA-1: 0b63fdb6b5868964fda93893e92d6ad6eace214e SHA-256: 17fba0cbc9bcda11d074ce3017293d3a6aa8513d47a22ec718ed2e6ba1ba6084
154 Risk Score

Malware Insights

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

The PDF contains embedded links, with one specifically pointing to a known malicious redirector infrastructure. The document body, though partially corrupted, contains text related to 'laser cut sheet metal prototype' and a URL that appears to be part of a link farm designed to attract traffic. The presence of numerous external links, many pointing to benign Shopify PDFs, suggests an attempt to obscure the malicious redirector among legitimate content.

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=laser+cut+sheet+metal+prototype
    • http://files.lefthandedgolfaustralia.com/uploads/1/3/0/8/130813511/5f75aa0.pdf
    • http://robim.nawicmidwestregion.org/uploads/1/3/2/6/132695569/feviwolo.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0434/5685/6230/files/sifedabipemib.pdf
    • https://cdn.shopify.com/s/files/1/0433/6844/8152/files/susenonelukagusobalo.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/kewosa.pdf
    • https://cdn.shopify.com/s/files/1/0452/7416/9505/files/alimentos_acidos_alcalinos.pdf
    • https://cdn.shopify.com/s/files/1/0460/6561/5003/files/49025608252.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/lonuxifipepi.pdf
    • https://cdn.shopify.com/s/files/1/0444/4015/8374/files/cub_cadet_ltx_1050_manual.pdf
    • https://cdn.shopify.com/s/files/1/0433/4410/1544/files/36199122487.pdf
    • https://cdn.shopify.com/s/files/1/0434/7605/8274/files/23185203068.pdf
    • https://cdn.shopify.com/s/files/1/0439/5198/0712/files/gamotejameximemerame.pdf
    • https://cdn.shopify.com/s/files/1/0437/7313/2954/files/hdfc_bank_credit_card_statement_password.pdf
    • https://cdn.shopify.com/s/files/1/0437/5812/5207/files/vimerofeduvizizifaw.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005e6e.bin
9f7b5ed9c14bf1171e1e251bfd51697229d5ae10689381ec22403201d7703eb2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5E6E 4944 bytes
font_01_sfnt_off00006f47.bin
e1f9e647d196b4b30e9f0722d2d25497f4d6b0829b78fbfa13e0c8790dac5b49		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6F47 9920 bytes
font_02_sfnt_off00009104.bin
b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9104 4324 bytes

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