Malicious PDF — malware analysis report

Static analysis result for SHA-256 b511ea17244cf229…

MALICIOUS

PDF

41.1 KB Created: 2020-08-18 15:59:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: adeeffb2d5685aefb2955d8611b2fd84 SHA-1: 8faa557a47a7e9ac9a27de7c89d77ae07c3bd081 SHA-256: b511ea17244cf22944a8c374f641230bc138331a83913449ea15f9048955782e
128 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, specifically pointing to 'ttraff.ru'. It also exhibits characteristics of a PDF link farm, with numerous embedded URLs, many hosted on Shopify. The document body, though heavily obfuscated, contains references to 'Adobe photoshop cs6 direct link' and the malicious URL, suggesting a lure for software downloads. The presence of a download button heuristic further supports this. No scripts were extracted, limiting the analysis of the payload.

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.ru/pify?keyword=adobe+photoshop+cs6+direct++link
    • http://files.swisscompleteeyecare.com/uploads/1/3/1/4/131453068/ca3d9.pdf
    • http://files.colateachesmath.com/uploads/1/3/2/6/132682640/nesofipubo.pdf
    • https://cdn.shopify.com/s/files/1/0433/9813/5966/files/australian_super_financial_report_2017.pdf
    • https://cdn.shopify.com/s/files/1/0431/9445/0082/files/67534522844.pdf
    • https://cdn.shopify.com/s/files/1/0431/4929/5776/files/bilangan_berpangkat_dan_bentuk_akar.pdf
    • https://cdn.shopify.com/s/files/1/0432/6434/4219/files/mopum.pdf
    • https://cdn.shopify.com/s/files/1/0429/1729/8342/files/28536823859.pdf
    • https://cdn.shopify.com/s/files/1/0434/2140/1237/files/36227895590.pdf
    • https://cdn.shopify.com/s/files/1/0432/0677/0849/files/66385574351.pdf
    • https://cdn.shopify.com/s/files/1/0433/4374/1083/files/dexubumu.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/porovurujapiganipuzul.pdf
    • https://cdn.shopify.com/s/files/1/0439/2163/7544/files/wewotesoperesoled.pdf
    • https://cdn.shopify.com/s/files/1/0429/6769/5509/files/28850891897.pdf
    • https://cdn.shopify.com/s/files/1/0429/3256/8220/files/36321642013.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_off00006324.bin
632aa8b19ef42d751d306c9babba055b8c76a3ad20dd3a5412bcd0dd6f97701a
pdf-font-stream PDF embedded font (sfnt) at offset 0x6324 5300 bytes
font_01_sfnt_off00007523.bin
5ad16547b661f275919e856e9b9341b1df11358b600f9688868100652cb82375
pdf-font-stream PDF embedded font (sfnt) at offset 0x7523 10128 bytes