Malicious PDF — malware analysis report

Static analysis result for SHA-256 86bd3a9b6c3c47db…

MALICIOUS

PDF

39.8 KB Created: 2020-08-22 12:08:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a2f6f8277e7c9364170e77fc49a1aed5 SHA-1: f7630282e5fcb58f8db36a9052ac8b81b817501b SHA-256: 86bd3a9b6c3c47dbc09b95f9b84faa951a5d7593d00a61dfb8e47c59d78a55d0
150 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.com, which is disguised as sheet music. This indicates a phishing or malware delivery attempt. The PDF also contains a large number of links to other PDFs hosted on Shopify, likely for SEO manipulation to improve search engine ranking for malicious content. No scripts were extracted, but the presence of the malicious redirector and the document's deceptive content strongly suggest a phishing or malware distribution attack.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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/pify?keyword=rejoice+in+the+lamb+sheet+music+pdf
    • http://files.robbielairdartstudio.com/uploads/1/3/2/7/132712233/96071c.pdf
    • http://files.judith-wiley.ca/uploads/1/3/1/3/131398164/desiviz.pdf
    • http://files.amandaesorensen.com/uploads/1/3/2/6/132681836/fb40316fd6755.pdf
    • https://cdn.shopify.com/s/files/1/0431/4903/3640/files/zowumoviganu.pdf
    • https://cdn.shopify.com/s/files/1/0428/2092/7644/files/mawosatezawazi.pdf
    • https://cdn.shopify.com/s/files/1/0433/4603/4853/files/9193459512.pdf
    • https://cdn.shopify.com/s/files/1/0441/3010/7544/files/difijanutasusaxijud.pdf
    • https://cdn.shopify.com/s/files/1/0434/1714/1415/files/dikirokifosigidixugokas.pdf
    • https://cdn.shopify.com/s/files/1/0430/7543/6698/files/60507431438.pdf
    • https://cdn.shopify.com/s/files/1/0436/1617/4237/files/12832224239.pdf
    • https://cdn.shopify.com/s/files/1/0432/3773/6603/files/cisco_2960_xr_datasheet.pdf
    • https://cdn.shopify.com/s/files/1/0434/2687/3509/files/wireless_router_configuration.pdf
    • https://cdn.shopify.com/s/files/1/0432/1817/4107/files/93172819421.pdf
    • https://cdn.shopify.com/s/files/1/0432/3124/8542/files/sat_subject_test_biology_practice_test.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_off00005de5.bin
c8f6df03716c6401d1aa6d452ca9db94c38eec3e7d18b909d0f1536559cb2f71		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5DE5 5520 bytes
font_01_sfnt_off0000707f.bin
cc16dc0769b834c6895f4c1605ad65457ce22e1464f605d4ca392300af1b11cd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x707F 9968 bytes

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