Malicious PDF — malware analysis report

Static analysis result for SHA-256 380e9e0f107c982a…

MALICIOUS

PDF

42.1 KB Created: 2020-09-02 21:34:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0e102d32a8b430ac1189ec520a2e6c2a SHA-1: d680bc3c321da18fbeb2c9bf3321f08ea8212c09 SHA-256: 380e9e0f107c982a1faeb0ee62c695e8ae39f2f2eb5bc5730bb1c2a4b59598d6
152 Risk Score

Malware Insights

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

The PDF contains a prominent link that is identified as a malicious redirector. The document body, though heavily obfuscated, contains text suggesting a lure for a 'free general affidavit template word', and the embedded URL points to this redirector. The PDF also contains a large number of external links, many hosted on Shopify, which is indicative of a link farm designed to manipulate search engine results or distribute malicious content. The ML classifier 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.link/pify?keyword=free+general+affidavit+template+word
    • https://cdn.shopify.com/s/files/1/0435/4434/6792/files/16379003135.pdf
    • https://cdn.shopify.com/s/files/1/0432/6208/3232/files/totejirumamarotafakovebon.pdf
    • https://cdn.shopify.com/s/files/1/0430/7664/9121/files/romelogagu.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/rinavupomun.pdf
    • https://cdn.shopify.com/s/files/1/0431/5768/4385/files/analytics_platform_system_appliance.pdf
    • https://cdn.shopify.com/s/files/1/0431/6115/7794/files/54822891439.pdf
    • https://cdn.shopify.com/s/files/1/0433/2853/6734/files/caisse_d_pargne_recrutement_informatique.pdf
    • https://cdn.shopify.com/s/files/1/0430/6200/1825/files/vejoxomorobisigokaka.pdf
    • https://cdn.shopify.com/s/files/1/0430/4732/1751/files/64397241314.pdf
    • https://cdn.shopify.com/s/files/1/0438/2405/4429/files/django_cms_templates_free.pdf
    • https://static.usrfiles.com/ugd/12dc78_b5890c7b6f3b45caa428646734f4a35f.pdf
    • https://static.usrfiles.com/ugd/0f1814_c3f7e8934f6c4efaab7753eb57a2d243.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/mefiwi.pdf
    • https://cdn.shopify.com/s/files/1/0432/6863/6834/files/54391835155.pdf
    • https://cdn.shopify.com/s/files/1/0439/4339/5483/files/tukedegimatiwalawonujed.pdf
    • https://cdn.shopify.com/s/files/1/0433/4957/3784/files/74144549876.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_off000066ed.bin
8e6ff5f53a9030bf905a00bff5f6e7ad99fb415c7c76dec6310d9d2c1c6a6b10		 pdf-font-stream PDF embedded font (sfnt) at offset 0x66ED 5292 bytes
font_01_sfnt_off000078f0.bin
15af702cd8fb0c2086ea077615df183280159665c72b9482e354d1d9cc222ac2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x78F0 10188 bytes

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