Malicious PDF — malware analysis report

Static analysis result for SHA-256 979fd10a8ea33be1…

MALICIOUS

PDF

40.7 KB Created: 2020-08-15 02:58:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ab5abbe6a917ac1176bade4cfbb8453e SHA-1: eb73c2ae45d40482065c3a5826f50ffe99da785c SHA-256: 979fd10a8ea33be103bc8153db6c67a27ec012fd525ce251f207a92b2df64688
150 Risk Score

Malware Insights

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

The PDF file exhibits malicious behavior through a high density of external links, identified as a PDF link farm. One prominent link, 'https://ttraff.cc/wb?keyword=ielts%20listening%20spelling%20words%20pdf%20download', points to a known malicious redirector. The ML classifier also strongly flagged this PDF as malicious. The document body, though heavily obfuscated, contains the same redirector URL, suggesting its primary purpose is to lure users to malicious infrastructure.

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.cc/wb?keyword=ielts%20listening%20spelling%20words%20pdf%20download
    • http://files.tanyagoldhaber.com/uploads/1/3/0/7/130776481/kotofuvixanun.pdf
    • http://vosugej.antsrus.com/uploads/1/3/2/6/132681482/3351142.pdf
    • https://cdn.shopify.com/s/files/1/0430/8670/8889/files/52154526428.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/lojuxefututa.pdf
    • https://cdn.shopify.com/s/files/1/0431/7256/1050/files/xodekogutizewavebamanumuz.pdf
    • https://cdn.shopify.com/s/files/1/0432/7941/7504/files/48639782526.pdf
    • https://cdn.shopify.com/s/files/1/0435/2393/2311/files/95337626331.pdf
    • https://cdn.shopify.com/s/files/1/0437/7139/6257/files/teri_aankhen_video_song.pdf
    • https://cdn.shopify.com/s/files/1/0433/4537/9478/files/38482684306.pdf
    • https://cdn.shopify.com/s/files/1/0429/0838/5439/files/cetuximab_package_insert.pdf
    • https://cdn.shopify.com/s/files/1/0431/4431/5029/files/nevetuzaru.pdf
    • https://cdn.shopify.com/s/files/1/0430/6799/8362/files/nisuxelifav.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/
    • https://cdn.shopify.com/s

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006231.bin
42d67b909b3a3b10f83b3ffb3f0a474bd78e789af6c25153eeb01193c94a58ef		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6231 5236 bytes
font_01_sfnt_off00007417.bin
632188f11d597aaec6ac892cb628dd12efa47aba3ba18e7a83bbe0dd24540730		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7417 9968 bytes

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