Malicious PDF — malware analysis report

Static analysis result for SHA-256 dd303f7c1d285b5b…

MALICIOUS

PDF

49.9 KB Created: 2020-08-05 00:12:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1dbf2e53e33f2fc5598a894b338a583d SHA-1: ee54f79fd89f2a92206f13ea83756ff6e7f0f7f6 SHA-256: dd303f7c1d285b5bd97c7fc77421afc85be45762e77e41470fbe60ff1919c6f2
152 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to Shopify domains hosting other PDFs. One critical heuristic indicates that a link within the document redirects to known malicious infrastructure (ttraff.cc). This suggests a link farm or redirection scheme designed to lead users to malicious content. The ML classifier also strongly flagged this PDF as malicious. No scripts were extracted, limiting the analysis of direct malicious actions.

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.cc/pify?keyword=paises+del+mundo+y+sus+capitales+pdf
    • http://files.11pluscolchester.com/uploads/1/3/0/7/130740533/gakotaguvageg.pdf
    • http://files.hughdrake.com/uploads/1/3/2/6/132681851/merefuzexutikix.pdf
    • http://files.hamiltonclaimssolutions.co.uk/uploads/1/3/0/8/130874197/nuzugoteragole.pdf
    • https://cdn.shopify.com/s/files/1/0435/5004/8419/files/cogat_sample_test_3rd_grade.pdf
    • https://cdn.shopify.com/s/files/1/0432/9740/7126/files/99710580469.pdf
    • https://cdn.shopify.com/s/files/1/0433/7752/4888/files/olevia_television_manuals.pdf
    • https://cdn.shopify.com/s/files/1/0432/9455/6320/files/42404864947.pdf
    • https://cdn.shopify.com/s/files/1/0432/9180/3801/files/nino_rota_amarcord_partitura.pdf
    • https://cdn.shopify.com/s/files/1/0431/3592/6434/files/62830699406.pdf
    • https://cdn.shopify.com/s/files/1/0428/9776/8614/files/sabajifelafixu.pdf
    • https://cdn.shopify.com/s/files/1/0432/6726/0576/files/fj62_manual.pdf
    • https://cdn.shopify.com/s/files/1/0441/2679/7976/files/48657168878.pdf
    • https://cdn.shopify.com/s/files/1/0432/0657/4238/files/53238437767.pdf
    • https://cdn.shopify.com/s/files/1/0431/6450/0122/files/cursive_alphabet_sheets.pdf
    • https://cdn.shopify.com/s/files/1/0437/6464/6049/files/38702576817.pdf
    • https://cdn.shopify.com/s/files/1/0437/0199/3622/files/basotegizupewoloteturoz.pdf
    • https://cdn.shopify.com/s/files/1/0437/2214/5943/files/90561626502.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_off00006730.bin
84c84e2da34638f682a690e2da9e72e8a69d0a658cee4348065b714628e7ec92		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6730 5192 bytes
font_01_sfnt_off000078cf.bin
829bbc7bf11edea3d08f26a102b73859da50c54964d1dc98f3e2070999b41bd4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x78CF 16616 bytes
font_02_sfnt_off0000aacc.bin
a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAACC 4324 bytes

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