Malicious PDF — malware analysis report

Static analysis result for SHA-256 baf0b7315e7fcd8d…

MALICIOUS

PDF

38.9 KB Created: 2020-08-25 13:49:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2c071bdec4dbdc2d5b0d220c8effc521 SHA-1: ab3b948d956ac222ba814f93bd694b31af9e37ac SHA-256: baf0b7315e7fcd8deae89d710a178a2888389615bf1a2eb64c480bca63da3b63
130 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link T1059.001 PowerShell

The PDF contains multiple embedded links, with one heuristic identifying a malicious redirector and another a link farm. The document body, though heavily obfuscated, contains a URL that appears to be part of the malicious infrastructure. The presence of a 'download button' lure further supports a phishing or social engineering attack pattern. The primary malicious IOC is the redirector URL, which likely leads to further stages of the 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=calendar+design+2020+pdf
    • http://files.lucreciadesignsllc.com/uploads/1/3/2/6/132682204/4955270.pdf
    • https://cdn.shopify.com/s/files/1/0437/1510/0826/files/55690994869.pdf
    • https://cdn.shopify.com/s/files/1/0434/8674/0646/files/2493830595.pdf
    • https://cdn.shopify.com/s/files/1/0430/9958/6714/files/vupixabeliku.pdf
    • https://cdn.shopify.com/s/files/1/0429/9846/4661/files/biodynamic_moon_planting_guide.pdf
    • https://cdn.shopify.com/s/files/1/0433/7215/0947/files/97479337389.pdf
    • https://cdn.shopify.com/s/files/1/0429/5809/4495/files/jeduvexuradegunigufas.pdf
    • https://cdn.shopify.com/s/files/1/0436/3298/4222/files/44635155457.pdf
    • https://cdn.shopify.com/s/files/1/0433/8096/5534/files/dj_alesso_songs.pdf
    • https://cdn.shopify.com/s/files/1/0429/8529/1937/files/pitexoje.pdf
    • https://cdn.shopify.com/s/files/1/0436/9078/6969/files/indivisible_achievements_guide.pdf
    • https://cdn.shopify.com/s/files/1/0434/3247/6838/files/accounting_standard_17_segment_reporting.pdf
    • https://cdn.shopify.com/s/files/1/0429/6006/0567/files/mipakego.pdf
    • https://cdn.shopify.com/s/files/1/0429/6572/9429/files/47344327602.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_off00005a21.bin
ee64e47d2170512bde425134d9104717fb3451f2746e64e671a00f456a398b72		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5A21 5388 bytes
font_01_sfnt_off00006c81.bin
991942a164a64416fe61daec19fefd0323d1a42ec013a96c7f5bcddfafd32108		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6C81 10120 bytes

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