Malicious PDF — malware analysis report

Static analysis result for SHA-256 da7cf1c0d2756f65…

MALICIOUS

PDF

39.7 KB Created: 2020-08-18 23:56:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6499fec24d3590aad0e14b3b6927c8fe SHA-1: 997d783b60fc321cb40081609bf6192d49618980 SHA-256: da7cf1c0d2756f65c66384239f2aae7d2c2625665e1a83a95bb7dd405f082f6e
128 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.cc/pify?keyword=blank+calendar+december+2017+printable+pdf'. Additionally, it exhibits characteristics of a PDF link farm, with numerous embedded URLs, including 'https://cdn.shopify.com/s/files/1/0428/5412/1635/files/soxeruxit.pdf' and 'http://dagur.nadiasalomon.com/uploads/1/3/1/3/131383409/3022242.pdf'. The presence of a visual download button lure further supports the malicious intent. No scripts were extracted, but the combination of a malicious redirector and a link farm suggests a phishing or content-luring attack.

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=blank+calendar+december+2017+printable+pdf
    • http://dagur.nadiasalomon.com/uploads/1/3/1/3/131383409/3022242.pdf
    • https://cdn.shopify.com/s/files/1/0428/5412/1635/files/soxeruxit.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/sarozasupevukofapunaxovu.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/67142307476.pdf
    • https://cdn.shopify.com/s/files/1/0427/7652/7014/files/vekida.pdf
    • https://cdn.shopify.com/s/files/1/0440/4379/6645/files/balavuzizikolilo.pdf
    • https://cdn.shopify.com/s/files/1/0433/1854/2504/files/phytophthora_life_cycle.pdf
    • https://cdn.shopify.com/s/files/1/0431/5086/8646/files/61645699603.pdf
    • https://cdn.shopify.com/s/files/1/0429/6137/1290/files/35064087039.pdf
    • https://cdn.shopify.com/s/files/1/0438/8156/2280/files/lujurakegojikogetezolim.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_off00005c0a.bin
e46cdb2e7ef698428b37e960df5da80e41ba6454350878240c5acca7a4ebb683		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5C0A 5784 bytes
font_01_sfnt_off00006faf.bin
2cae163cff0ab8eb28770319663d46c41a28c30fef45f15e722cada2990d5465		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6FAF 10112 bytes

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