Malicious PDF — malware analysis report

Static analysis result for SHA-256 396f679b825a60d3…

MALICIOUS

PDF

53.0 KB Created: 2020-08-02 14:20:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 07c9d290fdb50191a26438f482e00856 SHA-1: 6995f8d68889a7d4282a746d69822f37c1f83a14 SHA-256: 396f679b825a60d3321d2dd11ace91759ecaf0d1c53ade3d962f45339bb829b7
152 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing indicating it links to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains the URL 'https://ttraff.com/pify?keyword=classic+wow+blood+shard', which is also flagged as malicious. The presence of a large number of embedded links, many pointing to Shopify domains, suggests a link farm or a method to obscure the ultimate destination. The ML classifier also strongly flagged this PDF as malicious.

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=classic+wow+blood+shard
    • http://files.positivelyleah.com/uploads/1/3/1/6/131636769/doxoxesumaranuz_vomenijopefije_rinidobepuz_zinipuni.pdf
    • http://files.teencareercenter.com/uploads/1/3/1/3/131380531/babowizujomas.pdf
    • http://files.mintconditioncoinringcrafters.com/uploads/1/3/1/4/131437919/34ffc0ff4188.pdf
    • http://files.greenleaforganizing.com/uploads/1/3/1/0/131070526/7862953.pdf
    • https://cdn.shopify.com/s/files/1/0438/4528/8093/files/14680735077.pdf
    • https://cdn.shopify.com/s/files/1/0432/0142/9662/files/284940265.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/wuwikeg.pdf
    • https://cdn.shopify.com/s/files/1/0428/3963/8179/files/38325551260.pdf
    • https://cdn.shopify.com/s/files/1/0429/3197/8403/files/89890726750.pdf
    • https://cdn.shopify.com/s/files/1/0430/6727/7469/files/mezeneluge.pdf
    • https://cdn.shopify.com/s/files/1/0433/2666/8952/files/24078443413.pdf
    • https://cdn.shopify.com/s/files/1/0429/3656/5923/files/falolexumomuxenudozimodor.pdf
    • https://cdn.shopify.com/s/files/1/0437/7185/5002/files/bruice_7th_edition_solutions_manual.pdf
    • https://cdn.shopify.com/s/files/1/0435/3448/3616/files/lopuwukajexugifutokopuve.pdf
    • https://cdn.shopify.com/s/files/1/0431/2917/6232/files/xanakofozegavezefedowew.pdf
    • https://cdn.shopify.com/s/files/1/0438/5921/4501/files/yekaterina_makrova_porn_star.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_off00008c46.bin
3f07f1e4b7358a36c04ccf2a1532eb59457b14ebbe81463f842cdc6c5f769ade		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8C46 5164 bytes
font_01_sfnt_off00009dd4.bin
97e4edf74d1354d778d4d4bbbecad8ada62a25e01cee3efad1e0444ca1b8283d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9DD4 12964 bytes

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