Malicious PDF — malware analysis report

Static analysis result for SHA-256 1ca66618d23d24d1…

MALICIOUS

PDF

38.6 KB Created: 2020-08-09 06:18:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6dbe51d441225368ba47bd0f9897928a SHA-1: 311cb3319d6679281dc32223e177967462400ba7 SHA-256: 1ca66618d23d24d1fc2cf28e96dcf6c15deed5df42275d61413c6491cf7edf7f
120 Risk Score

Malware Insights

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

The PDF contains numerous links to external resources, masquerading as exercise materials. One of these links, 'https://ttraff.ru/pify?keyword=adjectives+and+adverbs+of+manner+exercises+pdf', points to a known malicious redirector. The document body is heavily obfuscated, but the presence of this malicious link and the heuristic firings indicate a phishing or redirection attempt. No scripts were extracted from this sample.

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=adjectives+and+adverbs+of+manner+exercises+pdf
    • http://reboze.jessicaharperyoga.com/uploads/1/3/1/4/131409090/jujamuduronugal.pdf
    • http://files.capecodspeechlanguagepathologists.com/uploads/1/3/1/4/131483603/0db9440.pdf
    • http://kejoxogis.jiaweitay.com/uploads/1/3/1/4/131454065/3250348.pdf
    • http://files.stirlingguesthouse.co.uk/uploads/1/3/0/7/130776826/vawobunox.pdf
    • https://cdn.shopify.com/s/files/1/0434/7976/1061/files/53696986103.pdf
    • https://cdn.shopify.com/s/files/1/0438/2598/7741/files/32845576742.pdf
    • https://cdn.shopify.com/s/files/1/0435/4624/7332/files/51083091634.pdf
    • https://cdn.shopify.com/s/files/1/0430/7006/2754/files/infectious_diseases_clinical_short_course.pdf
    • https://cdn.shopify.com/s/files/1/0435/2363/7402/files/momipexifefa.pdf
    • https://cdn.shopify.com/s/files/1/0431/0417/4233/files/97804527949.pdf
    • https://cdn.shopify.com/s/files/1/0432/3803/1518/files/doxikiwivapodupikuvuku.pdf
    • https://cdn.shopify.com/s/files/1/0434/0069/1879/files/defali.pdf
    • https://cdn.shopify.com/s/files/1/0428/0962/2687/files/97828816348.pdf
    • https://cdn.shopify.com/s/files/1/0432/7315/8806/files/48668109292.pdf
    • https://cdn.shopify.com/s/files/1/0428/8482/5247/files/95631455930.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_off00005109.bin
933b669382dc105f32a128157d6e6cdb8c9649369169ad69cf6f1dfbbf751e33		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5109 5604 bytes
font_01_sfnt_off0000640c.bin
11a7562047f2ed3ccdc3977da06cc3caa35ebf8b7323ad78bbede0e03f3e993d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x640C 12932 bytes

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