Malicious PDF — malware analysis report

Static analysis result for SHA-256 3d68642f3ffbd3a8…

MALICIOUS

PDF

50.5 KB Created: 2020-08-28 10:42:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 96ef853b650d34d55ab1954d6cd5aa6a SHA-1: 63fbc75f520fe4be37fdf958c2a8f56f52ae1d0a SHA-256: 3d68642f3ffbd3a8021043c1dc9ba9a362ca79ea862af9eb145737511bde5c55
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF was flagged by multiple critical heuristics for containing malicious redirector links and a large number of external links, indicative of SEO poisoning or a phishing campaign. The primary malicious URL identified is ttraff.ru, which is known to host redirectors. The document body contains garbled text but does include the malicious URL and several Shopify-hosted PDF links, some of which are benign but others are unknown.

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.ru/pify?keyword=%25C3%25A9quilibre+de+hardy+weinberg
    • http://dojiju.christyokeeffe.com/uploads/1/3/1/4/131407668/92d3a.pdf
    • http://files.ywp-za.org/uploads/1/3/1/6/131606630/1747469.pdf
    • https://cdn.shopify.com/s/files/1/0432/5661/0969/files/31141215917.pdf
    • https://cdn.shopify.com/s/files/1/0433/4639/5304/files/xoxewidirivaxajemomive.pdf
    • https://cdn.shopify.com/s/files/1/0434/0924/4317/files/79520226137.pdf
    • https://cdn.shopify.com/s/files/1/0432/3662/2498/files/ihss_direct_deposit.pdf
    • https://cdn.shopify.com/s/files/1/0427/6640/1692/files/46342710070.pdf
    • https://cdn.shopify.com/s/files/1/0430/6334/5301/files/alejandro_dolina_cuentos.pdf
    • https://cdn.shopify.com/s/files/1/0438/8211/9323/files/43724515784.pdf
    • https://cdn.shopify.com/s/files/1/0434/8664/2338/files/95761327442.pdf
    • https://cdn.shopify.com/s/files/1/0429/6415/6575/files/dowowabivumaxowutagadalak.pdf
    • https://cdn.shopify.com/s/files/1/0433/9869/3022/files/40595346890.pdf
    • https://cdn.shopify.com/s/files/1/0428/3724/6118/files/devegetalemoj.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/kikurum.pdf
    • https://cdn.shopify.com/s/files/1/0434/6219/7400/files/50702060061.pdf
    • https://cdn.shopify.com/s/files/1/0429/7719/8229/files/free_piano_sheet_music_popular_songs.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_off000071ce.bin
759c1e8eb74ab232f49dbea39e9fe31a67417451d6cac06328201a082093eb43		 pdf-font-stream PDF embedded font (sfnt) at offset 0x71CE 5348 bytes
font_01_sfnt_off00008403.bin
d813a71b50a9baca205c43a4e1fe3c426c0e85271f078a33605815fe60365896		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8403 18220 bytes

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