Malicious PDF — malware analysis report

Static analysis result for SHA-256 290c8cc69086e4e9…

MALICIOUS

PDF

53.1 KB Created: 2020-08-17 12:17:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1000723d1e5be828d430ad0b7e6c2c10 SHA-1: ec6727fb228f88b61ea34238cd6373f74044560c SHA-256: 290c8cc69086e4e9d5719b84b0cc1b5bc8ceae1c78cdb937f7643c4a7357b6a6
152 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by a machine learning classifier and contains a critical heuristic indicating a link to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains the URL 'https://ttraff.com/pify?keyword=ccd+id+full+form', which is identified as a malicious redirector. This suggests the primary purpose of the PDF is to lure users to a harmful external site.

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=ccd+id+full+form
    • http://files.minnesotaflyfishing.com/uploads/1/3/2/6/132682076/729810.pdf
    • http://juxazab.davidhunterbishop.com/uploads/1/3/1/4/131438216/jivekixu.pdf
    • http://fazolas.kkbuteau.com/uploads/1/3/2/6/132680813/kabure.pdf
    • http://pagut.edygies.com/uploads/1/3/1/3/131379179/jojesuwozewef.pdf
    • https://cdn.shopify.com/s/files/1/0440/7122/3446/files/sociabuzz_influencer_marketing_platform_agency_indonesia.pdf
    • https://cdn.shopify.com/s/files/1/0447/3107/2666/files/regrouper_2_fichiers_en_1_seul.pdf
    • https://cdn.shopify.com/s/files/1/0431/1715/0368/files/biotechnology_projects.pdf
    • https://cdn.shopify.com/s/files/1/0434/4417/5013/files/lelirupixepoduzibav.pdf
    • https://cdn.shopify.com/s/files/1/0432/9334/3899/files/piluxaxejapevumiludaxo.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/37237973095.pdf
    • https://cdn.shopify.com/s/files/1/0436/9691/4600/files/75750624914.pdf
    • https://cdn.shopify.com/s/files/1/0437/8407/7473/files/pidufejumagozosusewibe.pdf
    • https://cdn.shopify.com/s/files/1/0437/9131/9200/files/76338237063.pdf
    • https://cdn.shopify.com/s/files/1/0437/8918/9272/files/76035146608.pdf
    • https://cdn.shopify.com/s/files/1/0430/4375/0049/files/mawilawumenenixoso.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_off00008764.bin
03941006fbafe8c432e94db4c49752ab3b942812563b8be55ce7d8d1e428a4a6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8764 4380 bytes
font_01_sfnt_off00009631.bin
965ae2bf8da6dbafef350d360e65533a7f83cfb1d5487d01029fee479d427ef6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9631 10716 bytes
font_02_sfnt_off0000b9fb.bin
a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB9FB 4324 bytes

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