Malicious PDF — malware analysis report

Static analysis result for SHA-256 c7525a0f9fce737b…

MALICIOUS

PDF

42.5 KB Created: 2020-08-14 12:51:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: cc8b17c1eb1407604cba2083f20f7a9c SHA-1: 922039f22b831f098837139bdf06fb66f4a0dc5f SHA-256: c7525a0f9fce737ba8c90fc81d0e9536949b654e40d2e82b464feace3f3bf98e
128 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, with a critical heuristic firing indicating a PDF link to known malicious redirector infrastructure. The primary malicious URL identified is 'https://ttraff.cc/pify?keyword=irish+elk+ulala+guide'. The document body, though heavily obfuscated, also contains this URL and references to other PDF files hosted on Shopify. This suggests a link farm or redirector strategy to lure users to malicious content.

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.cc/pify?keyword=irish+elk+ulala+guide
    • http://files.gristletattoo.com/uploads/1/3/0/7/130775350/4843886.pdf
    • http://files.gametimeranch.com/uploads/1/3/0/8/130874124/nafonaja_zimenuso_zivijojufar_togemexek.pdf
    • http://files.andreasalem.com/uploads/1/3/1/3/131398509/216da416e383790.pdf
    • https://cdn.shopify.com/s/files/1/0439/5030/9531/files/adeno_hipofise.pdf
    • https://cdn.shopify.com/s/files/1/0437/8873/0525/files/classical_guitar_pieces_for_beginners.pdf
    • https://cdn.shopify.com/s/files/1/0429/2729/2582/files/85379052937.pdf
    • https://cdn.shopify.com/s/files/1/0430/6678/5949/files/48684298000.pdf
    • https://cdn.shopify.com/s/files/1/0430/6914/5241/files/98318901563.pdf
    • https://cdn.shopify.com/s/files/1/0434/8415/1974/files/git_pull_permission_denied_publickey.pdf
    • https://cdn.shopify.com/s/files/1/0438/5072/7584/files/bujuvozesapewek.pdf
    • https://cdn.shopify.com/s/files/1/0428/8030/3263/files/jerariwulopatas.pdf
    • https://cdn.shopify.com/s/files/1/0430/7219/2669/files/zeruripexiluwimejifuz.pdf
    • https://cdn.shopify.com/s/files/1/0429/3161/7945/files/8750811499.pdf
    • https://cdn.shopify.com/s/files/1/0429/1900/2268/files/35274206417.pdf
    • https://cdn.shopify.com/s/files/1/0433/5117/9416/files/nipijomalonegidemezuv.pdf
    • https://cdn.shopify.com/s/files/1/0432/4065/2960/files/wikinux.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_off00006713.bin
cc23d65e613d8b23866258a536d09ce6ebe720d2d46f0b4073a5ae4f921e8677
pdf-font-stream PDF embedded font (sfnt) at offset 0x6713 5088 bytes
font_01_sfnt_off0000784d.bin
5e86af496104a85a5dc405fe61d78aae4843c38faef1549e1c5d24cde2eb4bb4
pdf-font-stream PDF embedded font (sfnt) at offset 0x784D 10888 bytes