Malicious PDF — malware analysis report

Static analysis result for SHA-256 e0c4401d8c0103b7…

MALICIOUS

PDF

41.0 KB Created: 2020-08-25 00:23:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5181cad9f2dd1b6d6120e21b1ca5e7b6 SHA-1: b06b0a6cd437db838c7f0733a23d7637710ccc20 SHA-256: e0c4401d8c0103b7e57685c3c1426d40ef5564c8c630b983598d600d57713b0c
120 Risk Score

Malware Insights

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

The PDF contains a link farm and a critical redirector link, indicating a phishing or malicious redirection attempt. The document body, though partially corrupted, contains text suggesting it is a lure for a 'Cisco webex board 55 admin guide'. The primary malicious IOC is the redirector URL which likely leads to further malicious content.

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.cc/pify?keyword=cisco+webex+board+55+admin+guide
    • http://files.onecfi.com/uploads/1/3/2/6/132681192/414d43009a.pdf
    • http://files.southerncare.co.uk/uploads/1/3/1/3/131379792/3683773.pdf
    • http://files.scdentallab.com/uploads/1/3/2/6/132682404/6530977.pdf
    • https://cdn.shopify.com/s/files/1/0462/7742/7349/files/fabipomofijafanumite.pdf
    • https://cdn.shopify.com/s/files/1/0452/7511/9778/files/kejolil.pdf
    • https://cdn.shopify.com/s/files/1/0436/9340/8409/files/continuous_exponential_growth_and_decay_worksheet.pdf
    • https://cdn.shopify.com/s/files/1/0429/8624/2209/files/wevipepowurax.pdf
    • https://cdn.shopify.com/s/files/1/0433/4577/2698/files/89973834909.pdf
    • https://cdn.shopify.com/s/files/1/0435/2750/4024/files/dikibig.pdf
    • https://cdn.shopify.com/s/files/1/0428/7247/1718/files/12928542009.pdf
    • https://cdn.shopify.com/s/files/1/0431/8406/2622/files/3d_food_printing_technology.pdf
    • https://cdn.shopify.com/s/files/1/0431/8196/5474/files/halloween_flyer_templates_free_for_word.pdf
    • https://cdn.shopify.com/s/files/1/0430/9961/9492/files/38176708233.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_off000060e9.bin
e57f5bcce6c0b5cf5034eabb023520f917a7c961c2f2c31f638d029f905b637b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x60E9 5556 bytes
font_01_sfnt_off000073cb.bin
acf562cda71388c1e70d3e3d75ffb84828fe714805cbe4f9ff5fc8f4a9090857		 pdf-font-stream PDF embedded font (sfnt) at offset 0x73CB 10372 bytes

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