Malicious PDF — malware analysis report

Static analysis result for SHA-256 c7a11b7ef79482d5…

MALICIOUS

PDF

43.0 KB Created: 2020-08-12 20:55:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 82f647ea3dc235bfb6b73e75768a3d3a SHA-1: 80f7096c9e1f1f952b67961f801305e960184e65 SHA-256: c7a11b7ef79482d55fc9273e167297d1d34f721f183ea9705fc1f8ed0e89f576
120 Risk Score

Malware Insights

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

The PDF document was flagged for containing a malicious redirector link and a mass external PDF link farm. The primary malicious URL, 'https://ttraff.cc/pify?keyword=difference+between+andragogy+and+pedagogy+pdf', suggests a phishing or content-luring attempt. The document body, though heavily obfuscated, contains references to the same topic as the malicious URL, indicating a potential lure for users seeking information. The presence of numerous links, many pointing to Shopify domains, further supports the link farm heuristic.

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=difference+between+andragogy+and+pedagogy+pdf
    • http://files.ssatroop3.com/uploads/1/3/2/6/132681409/batitifanuf-tekixuri-nugolabalif-liwupujirebajo.pdf
    • http://files.essentialbeingcoaching.com/uploads/1/3/0/7/130738719/3177fd573.pdf
    • http://files.fordservoboretransmissionfixsolution.com/uploads/1/3/2/3/132302711/3667253.pdf
    • http://files.jashancatering.com/uploads/1/3/1/4/131453252/1441688.pdf
    • https://cdn.shopify.com/s/files/1/0431/0804/0853/files/dideguxuporivosiki.pdf
    • https://cdn.shopify.com/s/files/1/0433/7795/0881/files/lodijogawivisatubinukale.pdf
    • https://cdn.shopify.com/s/files/1/0434/0393/5911/files/zivekuvul.pdf
    • https://cdn.shopify.com/s/files/1/0430/7727/1713/files/57612476793.pdf
    • https://cdn.shopify.com/s/files/1/0434/8870/6717/files/absolutismo_ingles.pdf
    • https://cdn.shopify.com/s/files/1/0433/4885/2904/files/single_user_mode_mac.pdf
    • https://cdn.shopify.com/s/files/1/0429/8643/8807/files/zorerisonipolobubelifeki.pdf
    • https://cdn.shopify.com/s/files/1/0427/4031/8375/files/tadogi.pdf
    • https://cdn.shopify.com/s/files/1/0428/1827/3446/files/90984719110.pdf
    • https://cdn.shopify.com/s/files/1/0427/4287/4278/files/vemafonizo.pdf
    • https://cdn.shopify.com/s/files/1/0429/0881/1427/files/north_carolina_form_cd_405_instructions.pdf
    • https://cdn.shopify.com/s/files/1/0431/3884/2779/files/fanorupiseniromewazupafux.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_off00006958.bin
cfd89870092a34646d221606b809aa5c0e238f9b6a4e67058c5c8fa6445caf02
pdf-font-stream PDF embedded font (sfnt) at offset 0x6958 5448 bytes
font_01_sfnt_off00007c02.bin
e401e329ec8b295f46f9ff61cdf65624ad0f219c087bf6a84e2c96c8ae9dfdf2
pdf-font-stream PDF embedded font (sfnt) at offset 0x7C02 10272 bytes