Malicious PDF — malware analysis report

Static analysis result for SHA-256 1c09bfb5aeb16a14…

MALICIOUS

PDF

32.3 KB Created: 2020-08-12 16:14:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 54698ad889d4ae3dad5951901cc2ac6d SHA-1: 4f5ed91a6d92780b51b11f9afd738f625bc4fac2 SHA-256: 1c09bfb5aeb16a147d7043ddbdea45d41aadacaacc25ff2bc7327ea808a3816d
120 Risk Score

Malware Insights

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

The PDF contains a mass of external links, including a critical redirector to ttraff.com, indicating a link farm or phishing lure. The document body, though heavily obfuscated, contains the same URL that is also present in the heuristics. No scripts were extracted from this sample. The primary attack vector appears to be directing users to malicious infrastructure via embedded links.

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.com/wb?keyword=food%20chain%20and%20food%20web%20worksheet%20ks3
    • http://files.wellsmusicpublishers.com/uploads/1/3/0/8/130874067/7865840.pdf
    • http://files.keelancole.com/uploads/1/3/1/4/131453395/1090898.pdf
    • http://files.happygrocers.co/uploads/1/3/1/6/131637016/raliror.pdf
    • http://files.piercingcrossfit.com/uploads/1/3/1/8/131856191/eeab3.pdf
    • https://cdn.shopify.com/s/files/1/0428/3393/6547/files/21847090785.pdf
    • https://cdn.shopify.com/s/files/1/0430/2172/9955/files/rofixozobumos.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/74535711799.pdf
    • https://cdn.shopify.com/s/files/1/0434/3886/6593/files/difference_between_measurement_assessment_and_evaluation_in_education.pdf
    • https://cdn.shopify.com/s/files/1/0427/7898/4614/files/cuales_son_los_acuerdos_de_paz_en_guatemala.pdf
    • https://cdn.shopify.com/s/files/1/0431/3376/3746/files/senisutizujugemitet.pdf
    • https://cdn.shopify.com/s/files/1/0427/8976/5276/files/depodudoma.pdf
    • https://cdn.shopify.com/s/files/1/0429/1254/6975/files/movavi_video_converter_activation_key.pdf
    • https://cdn.shopify.com/s/files/1/0427/4431/6070/files/vepafubenazesapogajid.pdf
    • https://cdn.shopify.com/s/files/1/0439/4539/4331/files/binomische_formeln_bungen_klasse_8.pdf
    • https://cdn.shopify.com/s/files/1/0431/7360/9636/files/voice_changer_macintosh.pdf
    • https://cdn.shopify.com/s/files/1/0437/8483/1125/files/1293248083.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_off0000442b.bin
85d0db01e819a7e4451cb470c22cfa011faa2a9ea3e450ffe4cdd99170080d07		 pdf-font-stream PDF embedded font (sfnt) at offset 0x442B 5492 bytes
font_01_sfnt_off000056e0.bin
7d9d2a69683d951a5b2a45f7b45b1dd31d76751af67e84b9062de5d75792c28f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x56E0 8632 bytes

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