Malicious PDF — malware analysis report

Static analysis result for SHA-256 fb4e6f378cdc666a…

MALICIOUS

PDF

42.0 KB Created: 2020-08-02 06:50:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f52e4f4d1e5ad9cd5875a246c28e1388 SHA-1: b2e2f6a6881a27a4c7997d5687a41ecaa17e6bba SHA-256: fb4e6f378cdc666a94811987e6da085096453627dd63402b2f95233588b3d25e
152 Risk Score

Malware Insights

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

The PDF contains embedded links, one of which, 'https://ttraff.com/pify?keyword=free+steam+keys', is flagged as a malicious redirector. The document body, though heavily obfuscated, contains text related to 'Free steam keys' and the malicious URL, indicating a social engineering lure. The presence of numerous other PDF links, many hosted on Shopify, suggests a link farm designed to obscure the malicious destination.

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=free+steam+keys
    • http://files.vickystata.com/uploads/1/3/1/4/131452935/153282.pdf
    • http://files.mcmillinautomation.com/uploads/1/3/2/6/132681322/sefabizobotegirokufa.pdf
    • http://files.swic-denver.org/uploads/1/3/2/6/132681536/921715.pdf
    • http://files.iridescentideas.com/uploads/1/3/0/7/130776206/vunovapux.pdf
    • https://cdn.shopify.com/s/files/1/0433/6759/6184/files/kamenuvovuperiwabepomamus.pdf
    • https://cdn.shopify.com/s/files/1/0435/4356/0346/files/siwetitirolenonorilowemeb.pdf
    • https://cdn.shopify.com/s/files/1/0429/7211/9193/files/xufifabekupuke.pdf
    • https://cdn.shopify.com/s/files/1/0436/2859/3315/files/23782486874.pdf
    • https://cdn.shopify.com/s/files/1/0431/3517/2770/files/wifupaxetozazazegofal.pdf
    • https://cdn.shopify.com/s/files/1/0436/4143/8366/files/45427445713.pdf
    • https://cdn.shopify.com/s/files/1/0432/3803/1518/files/sinonefunotopozaparox.pdf
    • https://cdn.shopify.com/s/files/1/0434/1619/1138/files/zulel.pdf
    • https://cdn.shopify.com/s/files/1/0434/2611/9831/files/72507064266.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/58097506778.pdf
    • https://cdn.shopify.com/s/files/1/0432/0998/2107/files/kubag.pdf
    • https://cdn.shopify.com/s/files/1/0436/6788/2134/files/jevevurebodenup.pdf
    • https://cdn.shopify.com/s/files/1/0428/9645/7884/files/16049031626.pdf
    • https://cdn.shopify.com/s/files/1/0430/0318/3258/files/67975910748.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_off0000688e.bin
d7a1aba20272aa248fd85e795632c38dc7163fdd5c2f0dd240e4030602423978		 pdf-font-stream PDF embedded font (sfnt) at offset 0x688E 4920 bytes
font_01_sfnt_off00007942.bin
f6dea7aec9818b3395b4c76112a9ef6f7bd50945813ba636602560593a92997b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7942 9976 bytes

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