Malicious PDF — malware analysis report

Static analysis result for SHA-256 1d4ecf5e5d095ca3…

MALICIOUS

PDF

40.0 KB Created: 2020-08-13 07:48:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4cf712e36115dffdbe340616b5facef6 SHA-1: a9436944b851fc6444f87af1f80d0b07ece08603 SHA-256: 1d4ecf5e5d095ca3c328fb6210d7e839ae14cc0a8f6a40e41289f320b82967b5
120 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, specifically pointing to 'https://ttraff.cc/wb?keyword=deforestation%20introduction%20pdf'. Additionally, it exhibits a PDF link farm heuristic, indicating an attempt to distribute links to numerous external PDFs, many hosted on cdn.shopify.com. The document body, though heavily obfuscated, contains the same redirector URL, reinforcing the malicious intent. No scripts were extracted, but the primary attack vector appears to be social engineering via a deceptive link.

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/wb?keyword=deforestation%20introduction%20pdf
    • http://files.stonesthrowstudio.com/uploads/1/3/1/4/131453022/6599317.pdf
    • http://wumabovi.holistichealthdiy.com/uploads/1/3/1/6/131637047/8647001.pdf
    • http://files.pastelsinbloom.com/uploads/1/3/1/6/131606208/jidonaxumoju_konigunut_lasidi.pdf
    • https://cdn.shopify.com/s/files/1/0430/0675/4970/files/7852953074.pdf
    • https://cdn.shopify.com/s/files/1/0430/6688/4250/files/7025932353.pdf
    • https://cdn.shopify.com/s/files/1/0438/2952/6688/files/pronoun_antecedent_agreement_exercises_with_answers.pdf
    • https://cdn.shopify.com/s/files/1/0433/6828/4319/files/2561842956.pdf
    • https://cdn.shopify.com/s/files/1/0429/6572/9429/files/tekunufubawetofil.pdf
    • https://cdn.shopify.com/s/files/1/0433/2758/6472/files/34861020389.pdf
    • https://cdn.shopify.com/s/files/1/0432/4104/6171/files/cabinet_making_handbook.pdf
    • https://cdn.shopify.com/s/files/1/0431/2937/2836/files/71578712462.pdf
    • https://cdn.shopify.com/s/files/1/0428/1407/9143/files/12586076961.pdf
    • https://cdn.shopify.com/s/files/1/0432/5621/7750/files/55896854125.pdf
    • https://cdn.shopify.com/s/files/1/0429/2381/9175/files/98690525696.pdf
    • https://cdn.shopify.com/s/files/1/0430/3021/6855/files/vewogiki.pdf
    • https://cdn.shopify.com/s/files/1/0428/5857/8086/files/remikojerepolixadov.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_off00005ee8.bin
6dfe2ef0271c75f8ea8a503060a394f885196098df2d05f43bc0b004cea9284a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5EE8 5116 bytes
font_01_sfnt_off0000705d.bin
bde1d18fb3a5a6d2b46b7171213daf3f69e4e13624778951fc9e3abf37663e5a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x705D 10256 bytes

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