Malicious PDF — malware analysis report

Static analysis result for SHA-256 7017cfa78d4be652…

MALICIOUS

PDF

39.6 KB Created: 2020-08-04 01:03:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8f3b4f1e1f22127653568123eb82e64d SHA-1: 3923fa5fd3709dc6febb2d6e259f29bb50e71cf9 SHA-256: 7017cfa78d4be652b00643518a7883395f7d23894eb15b3d39f405e8e136d71e
154 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, with one specifically identified as a malicious redirector. The document body, though heavily obfuscated, contains text related to 'British admiralty chart catalogue pdf' and a URL that appears to be part of a link farm designed to attract search engine traffic. The primary malicious link is https://ttraff.cc/pify?keyword=british+admiralty+chart+catalogue+pdf, which likely leads to further malicious content. The presence of numerous external links, including the malicious redirector, indicates an attempt to direct users to potentially harmful websites.

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=british+admiralty+chart+catalogue+pdf
    • http://files.celiadrummond.net/uploads/1/3/1/3/131380849/waxoxidusi-rukonexof.pdf
    • http://files.mark-finn.co.uk/uploads/1/3/1/4/131453706/1962421.pdf
    • http://files.marzbanhealthandrehab.com/uploads/1/3/2/6/132681342/xanaloga.pdf
    • http://files.basketballhelp.net/uploads/1/3/2/6/132682663/587243.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0428/8210/5511/files/62395026870.pdf
    • https://cdn.shopify.com/s/files/1/0434/8326/7236/files/57891504558.pdf
    • https://cdn.shopify.com/s/files/1/0434/3716/2646/files/19149239994.pdf
    • https://cdn.shopify.com/s/files/1/0434/1468/3815/files/pivajerijibuwibigifipa.pdf
    • https://cdn.shopify.com/s/files/1/0432/2308/9307/files/52534324825.pdf
    • https://cdn.shopify.com/s/files/1/0433/8175/1964/files/xasonuwopamujubifuxofowi.pdf
    • https://cdn.shopify.com/s/files/1/0436/1771/4338/files/hunter_xc_manual.pdf
    • https://cdn.shopify.com/s/files/1/0430/8910/0951/files/19870629420.pdf
    • https://cdn.shopify.com/s/files/1/0432/7941/7504/files/wopukozezijefivebezu.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/4077026649.pdf
    • https://cdn.shopify.com/s/files/1/0428/6296/8991/files/jizalalun.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_off00005c1a.bin
b7c4276bf245491c36fe6f3591580cb563bc749e850adfdd3d912bae9308548d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5C1A 5720 bytes
font_01_sfnt_off00006f74.bin
b49e33fcfe192627be2acf30c9902c1c4c4651d5b02f72fb077c2ed74d9749a4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6F74 10060 bytes

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