Malicious PDF — malware analysis report

Static analysis result for SHA-256 07f7b9b0b382828b…

MALICIOUS

PDF

35.1 KB Created: 2020-08-17 15:28:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5d07c43f1a08db1f6267126a94462509 SHA-1: c236e5879e88dffd2099b8bf19c549c898809e0a SHA-256: 07f7b9b0b382828ba94b6e0602c94b92d63ba517249007f278b439776c295d50
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many pointing to Shopify domains hosting other PDFs, suggesting a link farm or SEO spam operation. One critical heuristic identified a link to a known malicious redirector at 'ttraff.com', which is likely the primary malicious destination. The document body, though heavily obfuscated, contains text related to a product manual and the malicious URL, indicating a lure to disguise the malicious intent. No scripts were extracted, but the presence of numerous links and the redirector heuristic strongly suggest a malicious redirection attempt.

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=char+broil+smartchef+smoker+manual
    • http://soxupuz.walkersonwater.com/uploads/1/3/0/7/130775257/9691587.pdf
    • http://files.sheroamswild.com/uploads/1/3/1/4/131438389/4677316.pdf
    • http://gabokam.certaintysales.com/uploads/1/3/1/4/131409926/pidedujofowava.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0438/4797/5062/files/fumegasozarebu.pdf
    • https://cdn.shopify.com/s/files/1/0429/7005/4805/files/jorugudavezodu.pdf
    • https://cdn.shopify.com/s/files/1/0428/4638/8380/files/83854957763.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/68906731860.pdf
    • https://cdn.shopify.com/s/files/1/0432/0978/5512/files/letelob.pdf
    • https://cdn.shopify.com/s/files/1/0433/0638/5568/files/vegolodopimifikedik.pdf
    • https://cdn.shopify.com/s/files/1/0431/1266/1152/files/ferasesikixigupufosogi.pdf
    • https://cdn.shopify.com/s/files/1/0429/7441/2949/files/90654856010.pdf
    • https://cdn.shopify.com/s/files/1/0430/7088/1946/files/levonimopizinijuboxi.pdf
    • https://cdn.shopify.com/s/files/1/0431/1947/6896/files/73393541591.pdf
    • https://cdn.shopify.com/s/files/1/0431/5398/1589/files/493643444.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/viloronijiletamuzolodoxe.pdf
    • https://cdn.shopify.com/s/files/1/0433/9925/0072/files/84110810294.pdf
    • https://cdn.shopify.com/s/files/1/0430/9689/9733/files/68946052901.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_off00004b8c.bin
d20dfbd6bd956377dc52dc31809b90de244695905da3758b07c0fb553f38ae46		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4B8C 5228 bytes
font_01_sfnt_off00005d34.bin
2b7751ae46d78c896b7dad4dd941b62b0440f73f3824d0140b19eb1c16844447		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5D34 10004 bytes

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