Malicious PDF — malware analysis report

Static analysis result for SHA-256 d510382f5a990a5e…

MALICIOUS

PDF

50.1 KB Created: 2020-08-08 00:32:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0c8ccba2784f9c7701009aaf17d9ddfb SHA-1: a1e992f29c3ef7e73694019ffde9e9abaa2b2d4d SHA-256: d510382f5a990a5eb5c00b95fc5432d57a78e6dd82c623239ae9adcffe6175e6
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains numerous embedded links, with a critical heuristic firing for a malicious redirector. The primary malicious URL, https://ttraff.ru/pify?keyword=dieta+vegetariana+saludable+pdf, is likely used to redirect users to further malicious content. The document body, though heavily obfuscated, contains this URL and other Shopify links, suggesting a lure to download seemingly benign files that ultimately lead to malicious infrastructure. The ML classifier strongly supports the malicious nature of this PDF.

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.ru/pify?keyword=dieta+vegetariana+saludable+pdf
    • http://files.mindscapegallerystl.com/uploads/1/3/2/6/132683111/1329c.pdf
    • http://files.alissahartenbaum.com/uploads/1/3/1/4/131482916/satogemimuxu_gubakumozeb.pdf
    • http://files.canoefun.ca/uploads/1/3/2/3/132303353/xunibonogulugijaxite.pdf
    • http://files.myfinalsnotes.com/uploads/1/3/1/6/131606923/efd8bc68582886.pdf
    • https://cdn.shopify.com/s/files/1/0435/7046/2883/files/59366046274.pdf
    • https://cdn.shopify.com/s/files/1/0437/4790/1592/files/99886761485.pdf
    • https://cdn.shopify.com/s/files/1/0434/4827/1000/files/learn_excel_beginners.pdf
    • https://cdn.shopify.com/s/files/1/0435/6354/8831/files/25055015246.pdf
    • https://cdn.shopify.com/s/files/1/0432/8164/5736/files/adhesive_bonding_book.pdf
    • https://cdn.shopify.com/s/files/1/0432/0401/8336/files/95750017582.pdf
    • https://cdn.shopify.com/s/files/1/0429/6274/7548/files/tomigavivis.pdf
    • https://cdn.shopify.com/s/files/1/0431/6335/3250/files/pimipubebinovumibubivowi.pdf
    • https://cdn.shopify.com/s/files/1/0434/0973/5845/files/gubobakovemanejufigiveb.pdf
    • https://cdn.shopify.com/s/files/1/0431/1128/4893/files/45247150379.pdf
    • https://cdn.shopify.com/s/files/1/0428/9635/9580/files/26714118543.pdf
    • https://cdn.shopify.com/s/files/1/0434/8434/8569/files/falevawodulifoduf.pdf
    • https://cdn.shopify.com/s/files/1/0432/5395/6758/files/firefly_episode_order.pdf
    • https://cdn.shopify.com/s/files/1/0428/9105/1161/files/lanigozebe.pdf
    • https://cdn.shopify.com/s/files/1/0430/1537/2949/files/31151269636.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000773d.bin
10858a7ce283db28fd2cb202b97b908cfef417ac39b22244473e948213bcdab4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x773D 5180 bytes
font_01_sfnt_off000088eb.bin
783f421b1fe491bb42c2f2190aa0d72e6e2a35d7c2854d47a94db5f2b5d18cca		 pdf-font-stream PDF embedded font (sfnt) at offset 0x88EB 10604 bytes
font_02_sfnt_off0000ad16.bin
9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAD16 4324 bytes

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