Malicious PDF — malware analysis report

Static analysis result for SHA-256 eb608fa521faba91…

MALICIOUS

PDF

53.3 KB Created: 2020-07-31 01:53:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b88301e3e75888584a11025bcdec716e SHA-1: 43424703785d598cf12e9e70e655b35aaca25758 SHA-256: eb608fa521faba912a78a217e5b28efc1cd8ecf81a166857b8da47a548ff8421
150 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics as malicious, specifically for containing links to a known malicious redirector and a large number of external links, suggesting a link farm for SEO manipulation or malware distribution. The ML classifier also strongly indicated maliciousness. The primary attack pattern involves redirecting users to potentially harmful websites.

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=%25D0%25B8%25D1%2581%25D0%25BA%25D1%2583%25D1%2581%25D1%2581%25D1%2582%25D0%25B2%25D0%25B5%25D0%25BD%25D0%25BD%25D1%258B%25D0%25B9+%25D0%25B8%25D0%25BD%25D1%2582%25D0%25B5%25D0%25BB%25D0%25BB%25D0%25B5%25D0%25BA%25D1%2582+%25D1%2581%25D0%25BE%25D0%25B2%25D1%2580%25D0%25B5%25D0%25BC%25D0%25B5%25D0%25BD%25D0%25BD%25D1%258B%25D0%25B9+%25D0%25BF%25D0%25BE%25D0%25B4%25D1%2585%25D0%25BE%25D0%25B4+pdf
    • http://files.littlebobtailresort.com/uploads/1/3/0/7/130776407/3179864.pdf
    • http://files.cantsitstill.net/uploads/1/3/1/4/131407235/7995694.pdf
    • http://files.accountabilitycitizenship.org/uploads/1/3/1/3/131384081/nokadaj_wunalazika_kovedag_gamipe.pdf
    • https://cdn.shopify.com/s/files/1/0437/9423/5553/files/42728339997.pdf
    • https://cdn.shopify.com/s/files/1/0432/7093/0600/files/nizewev.pdf
    • https://cdn.shopify.com/s/files/1/0430/7818/9205/files/xalilimesekorisepekolopov.pdf
    • https://cdn.shopify.com/s/files/1/0430/7399/4905/files/93365116341.pdf
    • https://cdn.shopify.com/s/files/1/0431/7973/7237/files/xevumebin.pdf
    • https://cdn.shopify.com/s/files/1/0438/0629/4176/files/91925490609.pdf
    • https://cdn.shopify.com/s/files/1/0431/2042/7157/files/91564345257.pdf
    • https://cdn.shopify.com/s/files/1/0432/3934/2247/files/dugusolisivuxekezewe.pdf
    • https://cdn.shopify.com/s/files/1/0427/9812/1119/files/82262297354.pdf
    • https://cdn.shopify.com/s/files/1/0433/9941/3925/files/40123939417.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/pegegezanonipilupe.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/files/1/0430/7818/9205/files/xalilimesekorisepek

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007e7b.bin
d5e19618937fe0c7d7177065c8edded9b2630d2ff5df6cfb6aefeaed2db0d549		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7E7B 5412 bytes
font_01_sfnt_off00009087.bin
02079aa57ba99ea179b181d5e78cf56af858c1bfc0938cea2c6c5f8c60430d83		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9087 17044 bytes

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