Malicious PDF — malware analysis report

Static analysis result for SHA-256 3fd6f1d7638d5172…

MALICIOUS

PDF

64.5 KB Created: 2020-09-19 07:18:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 50ea738a7b31bb4c22be39edb1fc24d2 SHA-1: 718b7421772a43074c81ae53e1f1493a9586725b SHA-256: 3fd6f1d7638d5172d58c2783f751eaca0000702f13897db88a2447f53524fdff
120 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link, which points to a URL that is likely part of a phishing or scam campaign. The document body, though heavily obfuscated, contains the same URL, suggesting it's the primary lure. The PDF also contains a link farm heuristic, indicating a large number of outbound links, many of which are to benign files, but the primary malicious link is clear.

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.me/wix?keyword=chemistry+a+study+of+matter+worksheet+measurement+answers
    • https://9b6ba4a1-331d-4003-ace1-7f4373fea6cd.filesusr.com/ugd/5b5da7_029624bee537465c98e7b44bccca6d65.pdf?index=true
    • https://ef6363d5-8ae2-4409-8d6a-6d510cf430ca.filesusr.com/ugd/fedf23_edb17c43ddd645cda2aef2f4dc9a0842.pdf?index=true
    • https://c82ff765-f512-4b2b-9bf3-861d428b5c16.filesusr.com/ugd/4c1554_703f26d1ae9f4c38828c33f9b2aab847.pdf?index=true
    • https://910b4535-38e2-4f82-9d6c-f204ab6a17aa.filesusr.com/ugd/ade4e6_ab87a4898a8a4f629a83099e523b2490.pdf?index=true
    • https://e12e1aed-7c03-40a2-aa31-5cf98b8faf27.filesusr.com/ugd/6a44d8_321e59b45a4046958f4cf83fc82bd9c7.pdf?index=true
    • https://01b43325-9343-48ee-8f97-6a03191a10cd.filesusr.com/ugd/136d3d_d9a797e0019f4c9ab238e43f6e365776.pdf?index=true
    • https://9ede3399-86c8-4500-9ef7-0363e22d65ed.filesusr.com/ugd/f95141_9851cfbeea314d329a413ddd227b9e81.pdf?index=true
    • https://dbd3c9c0-900a-4830-9e8a-e2f526370b1e.filesusr.com/ugd/6f5f23_6afaaf19dbd34e149235ecb7f7b9a5ab.pdf?index=true
    • https://1d41803c-4cb4-4a67-88df-bf0c78897834.filesusr.com/ugd/724bd4_a049e751201d4656bc74922c90783e62.pdf?index=true
    • https://f53d425e-22c8-497a-b98b-7699ec86f1d8.filesusr.com/ugd/5c9621_440f38a9819a4cdf8326901fb8d8affd.pdf?index=true
    • https://fd4c04c1-f595-458b-9591-e6af2ababe8f.filesusr.com/ugd/c4b402_7cdbcd130b2b4013826b2a7f05e85e9f.pdf?index=true
    • https://cdn.shopify.com/s/files/1/0435/4863/9391/files/biwefazepinoput.pdf
    • https://cdn.shopify.com/s/files/1/0430/6481/9874/files/6953108078.pdf
    • https://cdn.shopify.com/s/files/1/0431/6135/4389/files/brownie_uniform_placement.pdf
    • https://cdn.shopify.com/s/files/1/0433/9928/2845/files/31445430697.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_off0000be27.bin
eb6e4d88beddcf38a8f39eb7f632f8fc125ea1cad26f4929a796f65357964fb5
pdf-font-stream PDF embedded font (sfnt) at offset 0xBE27 5276 bytes
font_01_sfnt_off0000d000.bin
3e82b4a54d23f820dd9d694b6ab78d85edbffd01ce79bafc483ec6c25842461a
pdf-font-stream PDF embedded font (sfnt) at offset 0xD000 10844 bytes