Malicious PDF — malware analysis report

Static analysis result for SHA-256 899ebd698c545500…

MALICIOUS

PDF

39.1 KB Created: 2020-09-16 22:06:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8f19c733c00927db38e29e66bc00042b SHA-1: 7af6f656f9ee9d60a1100364daba695884cb0288 SHA-256: 899ebd698c54550079dda2dc68e351fbbedec1745081701895e6f36a1a694a8c
120 Risk Score

Malware Insights

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

The PDF file contains a critical heuristic firing for a malicious redirector link, pointing to `https://ttraff.club/wix?keyword=cook%2527s+essentials+technique+pressure+cooker+manual`. The document body, though partially corrupted, also contains this URL and text suggesting a lure related to a "pressure cooker manual". The presence of a large number of external PDF links, many hosted on `cdn.shopify.com`, indicates a link farm strategy, likely to improve SEO for malicious content or to obscure the primary malicious destination. The primary malicious URL is the most critical IOC.

Heuristics 3

  • 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.
  • 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.club/wix?keyword=cook%2527s+essentials+technique+pressure+cooker+manual
    • http://vivewekoj.tohrukanayama.com/uploads/1/3/2/3/132303093/vubaxo-nopexuf.pdf
    • https://cdn.shopify.com/s/files/1/0435/9372/8158/files/selection_sort_in_c.pdf
    • https://cdn.shopify.com/s/files/1/0463/6019/9323/files/gafokosofimodipuvo.pdf
    • https://cdn.shopify.com/s/files/1/0431/2439/2087/files/venirupedijizakobiwonemi.pdf
    • https://1996ad11-9bbc-42c9-b3f1-e40e3c18fce4.filesusr.com/ugd/badafb_e7204584b68a4d619e4db5f09e826f34.pdf?index=true
    • https://380dc4d1-1eb5-48ab-b768-689b4af5c631.filesusr.com/ugd/b42fd6_e099ca094ba74d8d86e0db20137bda7c.pdf?index=true
    • https://91db876f-730f-4980-add2-ce7b81e342f1.filesusr.com/ugd/eb6612_5f1c5552bc8946ffb9255d713e6a8d89.pdf?index=true
    • https://cdn.shopify.com/s/files/1/0437/9970/7810/files/voxedabafuxi.pdf
    • https://cdn.shopify.com/s/files/1/0436/5864/1573/files/addition_word_problems_4th_grade.pdf
    • https://cdn.shopify.com/s/files/1/0430/9748/9572/files/xudaxifetutinixuz.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_off00005ca0.bin
2828abc486833a793530b7072a15ff345c04b5d0f433d2cd27bceb733ee1c474		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5CA0 5304 bytes
font_01_sfnt_off00006e89.bin
bc537e86e48022da4f2b13101ba95ff3710f9656d81fea0c5204e440e17d680d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6E89 9708 bytes

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