Malicious PDF — malware analysis report

Static analysis result for SHA-256 36df3ca7e9065b6a…

MALICIOUS

PDF

42.0 KB Created: 2020-08-20 03:42:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e12580c255e9d352b7ff69ebd043021f SHA-1: cd6137ef19568cc2c6a9dc29f48e7b6a9e7b7385 SHA-256: 36df3ca7e9065b6a7922f1d2b965aae672ad5d9403310585d49ea6d35b3d00eb
154 Risk Score

Malware Insights

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

The PDF contains a mass of external links, many hosted on Shopify, designed to appear as legitimate content. One critical heuristic identified a link to a known malicious redirector, ttraff.com, which is used to obscure the final malicious destination. The document body, though heavily obfuscated, contains the same lure text and URLs found in the heuristics, confirming the intent to redirect users to 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.com/pify?keyword=dietary+guidelines+2015+sodium
    • http://guduxebo.hautellc.com/uploads/1/3/1/0/131070331/f7627.pdf
    • https://cdn.shopify.com/s/files/1/0427/7708/4070/files/berof.pdf
    • https://cdn.shopify.com/s/files/1/0436/0981/7251/files/gujijipisakijakasurupigij.pdf
    • https://cdn.shopify.com/s/files/1/0431/3533/6616/files/itunes_99_cent_movies.pdf
    • https://cdn.shopify.com/s/files/1/0431/8976/4245/files/argumentative_and_persuasive_essay_examples.pdf
    • https://cdn.shopify.com/s/files/1/0433/9079/5941/files/45588321364.pdf
    • https://cdn.shopify.com/s/files/1/0435/3287/7975/files/50296788959.pdf
    • https://cdn.shopify.com/s/files/1/0432/1856/7335/files/wugaxozapodonabizulorotik.pdf
    • https://cdn.shopify.com/s/files/1/0438/8188/9960/files/authoritative_classroom_management_style.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_off0000654c.bin
f38ef544b5eb6a1489ce2320d4a851809625cb563ef35c01c0fdb23eb4dbe4d3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x654C 5696 bytes
font_01_sfnt_off000078ad.bin
cd4ba53e6601cad75d00ce187f730badbeaa4dc1b8232a6f7d820fbd67e9be95		 pdf-font-stream PDF embedded font (sfnt) at offset 0x78AD 10284 bytes

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