Malicious PDF — malware analysis report

Static analysis result for SHA-256 d0c21a6771541a67…

MALICIOUS

PDF

40.2 KB Created: 2020-09-01 00:22:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: df06a968773d32171c389312ead2b30f SHA-1: ed4c7aceb7730ebbbc60b9238498335e9fa039cf SHA-256: d0c21a6771541a672d480c6cfc5e0e1587f1fe937cb0bd8ebd2a770bdd581a04
152 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.com/pify?keyword=cdot+i+70+traffic+report'. The document body, though heavily obfuscated, contains this URL and other benign-looking PDF links, suggesting a lure to external content. The ML classifier also strongly flagged this PDF as malicious. The presence of multiple external PDF links indicates a link farm strategy, likely to obscure the final malicious destination.

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=cdot+i+70+traffic+report
    • https://static.usrfiles.com/ugd/cec570_0ecab66bd4c24c5294e95dacd5d79b4f.pdf
    • https://static.usrfiles.com/ugd/d1c05f_4b934326d7704e789deb44fc90b1de67.pdf
    • https://static.usrfiles.com/ugd/b50c55_ee21f661081447b18253ffaf99ee764d.pdf
    • https://static.usrfiles.com/ugd/b8c837_e205eb3363e2408e819946be9afc4edc.pdf
    • https://static.usrfiles.com/ugd/b8c837_520995f7c83043e6beb2708b454780a3.pdf
    • https://static.usrfiles.com/ugd/be19e1_ce65cdedf52c401dbad43280fa1d1366.pdf
    • https://cdn.shopify.com/s/files/1/0435/6286/0699/files/31994706242.pdf
    • https://cdn.shopify.com/s/files/1/0430/7537/1159/files/budgeting_and_profit_planning.pdf
    • https://static.usrfiles.com/ugd/97368a_1fc15f8f7ac046e4bed80486596b6451.pdf
    • https://static.usrfiles.com/ugd/c5d40f_2816b7839b484bb3ba997927db7e4dd4.pdf
    • https://static.usrfiles.com/ugd/b8c837_2a6e593227de4e2e8719c2da2bdf19a4.pdf
    • https://static.usrfiles.com/ugd/b8c837_e41db60785a940b79d36a42069d4c010.pdf
    • https://static.usrfiles.com/ugd/ca300b_21ac99755779409f8e84fceb1588e85f.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_off000058fa.bin
8f87db4002caedf3c15bf5926c2ac5ba862e7fe9b9bc4c3d3dd5cc1fe8b9a928		 pdf-font-stream PDF embedded font (sfnt) at offset 0x58FA 5064 bytes
font_01_sfnt_off00006a4a.bin
e06fd36ada4dec4e8577732f59865e4d2e1d7ee6c665c12eaf5bfb7b3d9bc91b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6A4A 13156 bytes

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