Malicious PDF — malware analysis report

Static analysis result for SHA-256 7888350d770acc84…

MALICIOUS

PDF

44.6 KB Created: 2020-08-31 04:48:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4ffdbe82d7fa30ed62fcb9d016d5faaf SHA-1: 8d41345f715c5ee960db19be7a5cb4335485dd58 SHA-256: 7888350d770acc84665fa06c7a85f6e2ffd9368a1db97913ae4149e4252cb13c
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file contains a critical heuristic indicating it links to known malicious redirector infrastructure. The document body, though heavily obfuscated, includes the URL 'https://ttraff.com/wix?keyword=cumberland+valley+township+bedford+county+pa', which is flagged as malicious. Additionally, the PDF is identified as a link farm, suggesting an attempt to distribute malicious content or engage in SEO manipulation for malicious purposes. 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/wix?keyword=cumberland+valley+township+bedford+county+pa
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0432/5736/4638/files/minuwavavabipokerom.pdf
    • https://cdn.shopify.com/s/files/1/0437/6929/9098/files/certiport_excel_exam_answers.pdf
    • https://cdn.shopify.com/s/files/1/0432/2125/4312/files/diu_mirena_efectos_secundarios.pdf
    • https://cdn.shopify.com/s/files/1/0429/4869/0076/files/xikinirigalo.pdf
    • https://cdn.shopify.com/s/files/1/0437/7450/9213/files/absalom_absalom_free.pdf
    • https://static.usrfiles.com/ugd/b8c837_e0adebd9d97141c1a3f4f1d10c162897.pdf
    • https://static.usrfiles.com/ugd/77eba6_16307961e0554c55840abadd4ae5239e.pdf
    • https://cdn.shopify.com/s/files/1/0431/9117/3278/files/polel.pdf
    • https://cdn.shopify.com/s/files/1/0430/4335/6825/files/this_boy_s_life_tobias_wolff_free.pdf
    • https://cdn.shopify.com/s/files/1/0434/9270/4408/files/59996123791.pdf
    • https://cdn.shopify.com/s/files/1/0428/4894/4295/files/nuvedasilule.pdf
    • https://cdn.shopify.com/s/files/1/0431/7623/1072/files/14209500920.pdf
    • https://cdn.shopify.com/s/files/1/0432/4392/9757/files/bloom_taxonomy_verbs.pdf
    • https://cdn.shopify.com/s/files/1/0439/1682/0648/files/2020_design_torrent.pdf
    • https://cdn.shopify.com/s/files/1/0437/9780/7265/files/86731813943.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/
    • http://scripts.sil.org/OFL
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000567e.bin
49f111cdb6044d7769e5848c41cf01252a0dde87f5cc8c44e424744d3df0d38a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x567E 5692 bytes
font_01_sfnt_off000069be.bin
79d8e073d2ce4a8f2e32d1a6edb1aca177d55b067ca74d6a67024c2d82df581b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x69BE 11168 bytes
font_02_sfnt_off00008fcf.bin
c2f1b8e27e4c5d1eb6694bcf999bed56489d599ed66a9b176e3ad865fa2ee921		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8FCF 16232 bytes

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