Malicious PDF — malware analysis report

Static analysis result for SHA-256 7f959cb6312b3518…

MALICIOUS

PDF

73.5 KB Created: 2020-08-16 23:30:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b592d1a7dc2721e2ba77f5d3825b2439 SHA-1: e53555341041c22b2631eecc86772bbbcc1a1754 SHA-256: 7f959cb6312b3518efa0a38313119f1cb21e8bbc247ad42bd8de895247c0f8ab
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF contains numerous embedded links, with one identified as a malicious redirector pointing to 'ttraff.com'. The document body, though partially corrupted, includes the same URL, suggesting an attempt to lure users to a malicious site. The heuristic 'SE_CLIPBOARD_COMMAND_LURE' indicates the document may also instruct users to execute commands, further increasing the risk.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Clipboard command execution lure high SE_CLIPBOARD_COMMAND_LURE
    Document tells the user to copy or paste clipboard content into Run, PowerShell, cmd, or another shell-like execution context
  • 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=start+android+emulator+without+starting+android+studio
    • http://biriwuner.buschgeotech.com/uploads/1/3/0/7/130775162/2291460.pdf
    • http://dixizipi.ladderbird.com/uploads/1/3/2/6/132681352/1971852.pdf
    • http://files.hotrodhenrys.com/uploads/1/3/1/8/131856276/a0b6c900e9a0e88.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/nojigepinipefonumupitos.pdf
    • https://cdn.shopify.com/s/files/1/0428/6627/8556/files/gidonogetapojiwikisijo.pdf
    • https://cdn.shopify.com/s/files/1/0434/8936/2082/files/adolescent_depression_screening.pdf
    • https://cdn.shopify.com/s/files/1/0447/6724/8535/files/michigan_board_of_canvassers_manual.pdf
    • https://cdn.shopify.com/s/files/1/0429/7061/1871/files/weretapegoku.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/palafasejuzanuz.pdf
    • https://cdn.shopify.com/s/files/1/0431/7279/0432/files/xofixapuvovisowuzitubol.pdf
    • https://cdn.shopify.com/s/files/1/0439/8671/4782/files/infamous_second_son_paper_trail.pdf
    • https://cdn.shopify.com/s/files/1/0434/6108/3296/files/93824403730.pdf
    • https://cdn.shopify.com/s/files/1/0429/3427/2159/files/36241078600.pdf
    • https://cdn.shopify.com/s/files/1/0434/3277/1750/files/59554053541.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_off0000c978.bin
7336c58753eeb3d03a4c11f5437bff62c93faa192df9daad062e954703169307		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC978 5432 bytes
font_01_sfnt_off0000dbc8.bin
de9a278a1148bda4297b02ad62589f1317eb5b757776e61c090b68f04b72af33		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDBC8 11388 bytes
font_02_sfnt_off000102a6.bin
534e44c921e8acb9c8e993207df297c85ca6c672af4c6174c05b3ca24a170572		 pdf-font-stream PDF embedded font (sfnt) at offset 0x102A6 16388 bytes

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