Malicious PDF — malware analysis report

Static analysis result for SHA-256 afbccca830ace417…

MALICIOUS

PDF

33.5 KB Created: 2020-08-29 07:27:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a9b394ea48ffcb8489a88e51bd6ba429 SHA-1: e7141b9fcdd542c54feb6d1a79f09da39bdaf30f SHA-256: afbccca830ace41767726b384ae63f69802e3cb1e8d5e4b9b8e0c9cb0dd4bffa
128 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.com/wix?keyword=alter+ego+a1+workbook+pdf'. It also exhibits characteristics of a PDF link farm, with numerous embedded URLs. The presence of a 'download button' heuristic further suggests a social engineering lure to trick users into clicking the malicious link. No scripts were extracted from this sample.

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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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/wix?keyword=alter+ego+a1+workbook+pdf
    • https://static.usrfiles.com/ugd/b8c837_708fe6c2d1b544dd839c8f4c871f41a5.pdf
    • https://static.usrfiles.com/ugd/b8c837_5769e1b7c6f04deabef1f2ef0e60a801.pdf
    • https://static.usrfiles.com/ugd/b8c837_bbb0d3a6468c4f348c6ca5ee6f45e002.pdf
    • https://static.usrfiles.com/ugd/b8c837_b4ddae6f16c24df8802168dbf9c83dd1.pdf
    • https://static.usrfiles.com/ugd/b8c837_7caae7fb7eea4064ac077435fc87f62d.pdf
    • https://cdn.shopify.com/s/files/1/0433/9410/5509/files/bloodborne_forbidden_woods.pdf
    • https://cdn.shopify.com/s/files/1/0430/6170/6903/files/gipavatedutamur.pdf
    • https://cdn.shopify.com/s/files/1/0433/0841/7192/files/dactyloscopy_question_and_answer.pdf
    • https://cdn.shopify.com/s/files/1/0437/7870/3518/files/tl431_datasheet.pdf
    • https://cdn.shopify.com/s/files/1/0440/1538/6789/files/bbmp_tax_form_v.pdf
    • https://static.usrfiles.com/ugd/b8c837_a5c81397ab4b44b1bdc1c05c705651da.pdf
    • https://static.usrfiles.com/ugd/b8c837_15ed129fcd0844e1a23b0fb6e61b0310.pdf
    • https://static.usrfiles.com/ugd/b8c837_b29f45de7f814aa08cb9222f53663492.pdf
    • https://cdn.shopify.com/s/files/1/0466/5858/4741/files/wetowoludi.pdf
    • https://cdn.shopify.com/s/files/1/0431/4143/1464/files/negumelomesisexiz.pdf
    • https://cdn.shopify.com/s/files/1/0434/5731/4977/files/91363267114.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_off0000463b.bin
40909620d9c5b299e72c5f4a5255668fb8100808eea2fcc7faaec0d9d9c056c2
pdf-font-stream PDF embedded font (sfnt) at offset 0x463B 5368 bytes
font_01_sfnt_off000058a1.bin
c83db24b6988bfd8e6318c7c974d9a501edf7f061d9f1e01edc507226e21964b
pdf-font-stream PDF embedded font (sfnt) at offset 0x58A1 9560 bytes