Malicious PDF — malware analysis report

Static analysis result for SHA-256 5346a083c8d039f6…

MALICIOUS

PDF

39.2 KB Created: 2020-08-22 01:22:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c4fa15c07c1ae748b33f2613ce29d424 SHA-1: 00f068bd5d56a6beaa8eaad951680ec87cd6da14 SHA-256: 5346a083c8d039f6685fa16b58888cc7d49fae2562c8f2ab9fbd5679f0bb8172
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF document contains embedded links that lead to a known malicious redirector, ttraff.com. The document body, though heavily obfuscated, contains text referencing 'Christmas carol song sheets' and the malicious URL, suggesting a lure to trick users into clicking the link. The PDF also hosts a large number of external links, many pointing to Shopify, likely as part of an SEO-based link farm to improve search engine ranking for malicious 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.com/pify?keyword=christmas+carol+song+sheets
    • http://jerazeb.zandq.com/uploads/1/3/0/9/130969204/wigevewuri_mileluleninule.pdf
    • https://cdn.shopify.com/s/files/1/0432/1266/9089/files/supofitokopa.pdf
    • https://cdn.shopify.com/s/files/1/0436/2154/8194/files/16867493306.pdf
    • https://cdn.shopify.com/s/files/1/0434/5679/0678/files/99825656146.pdf
    • https://cdn.shopify.com/s/files/1/0431/2150/8509/files/nuduxibigutawer.pdf
    • https://cdn.shopify.com/s/files/1/0429/9112/4643/files/woxazi.pdf
    • https://cdn.shopify.com/s/files/1/0436/9616/0921/files/88988378029.pdf
    • https://cdn.shopify.com/s/files/1/0427/4785/5004/files/paxiwepusaxubowekuvuzize.pdf
    • https://cdn.shopify.com/s/files/1/0431/9982/4032/files/xafirotarebokejotuguvu.pdf
    • https://cdn.shopify.com/s/files/1/0434/2510/4028/files/nubazudimaxemodo.pdf
    • https://cdn.shopify.com/s/files/1/0431/8350/5570/files/zewatevi.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/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005c58.bin
a32157491f545fa254aa8a05705cd66e678de15a3f5f689dca6eaae2481fd08b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5C58 5116 bytes
font_01_sfnt_off00006d95.bin
3216a12913ea3d8d8ab8a87817fa98417710a30a548ad65912230c20f55a29b8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6D95 10224 bytes

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