Malicious PDF — malware analysis report

Static analysis result for SHA-256 b4221a59aaa3d4ce…

MALICIOUS

PDF

46.0 KB Created: 2020-08-08 05:39:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 803737be40edb24ef97b0ab7cc47a132 SHA-1: 50d5c3fe076b49a27340c6ace51f27cbd1260d85 SHA-256: b4221a59aaa3d4ce7d7ad10e45ba1da23410628eb281b4a6735f574fa8fd9f13
120 Risk Score

Malware Insights

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

The PDF file contains multiple embedded links, with one critical heuristic identifying a link to a known malicious redirector. The document body, though heavily obfuscated, contains the string 'https://ttraff.com/pify?keyword=open+g+tuning+chords+pdf', indicating a lure for users to click on this malicious URL. The presence of a link farm further suggests an attempt to distribute malicious content.

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=open+g+tuning+chords+pdf
    • http://files.huntershealingcalls.com/uploads/1/3/1/0/131070718/tezisakudenev.pdf
    • http://files.picassofaceandbodypainter.com/uploads/1/3/1/6/131606431/3d9916d6051.pdf
    • http://kufofine.proctorlutheran.org/uploads/1/3/0/7/130739553/vukiloliw_ragewiv.pdf
    • http://files.nugrun.info/uploads/1/3/0/7/130775134/9990619.pdf
    • https://cdn.shopify.com/s/files/1/0429/4737/9356/files/kuxibudinek.pdf
    • https://cdn.shopify.com/s/files/1/0432/8197/3416/files/lusuridamulu.pdf
    • https://cdn.shopify.com/s/files/1/0437/1283/9834/files/79745008661.pdf
    • https://cdn.shopify.com/s/files/1/0429/2981/5705/files/residential_landscape_architecture_6th_edition_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0434/6265/6152/files/hold_mail_form.pdf
    • https://cdn.shopify.com/s/files/1/0432/1627/3576/files/begin_the_beguine_clarinet.pdf
    • https://cdn.shopify.com/s/files/1/0431/3353/4357/files/75113338142.pdf
    • https://cdn.shopify.com/s/files/1/0434/7153/6290/files/caste_certificate_form_rajasthan.pdf
    • https://cdn.shopify.com/s/files/1/0430/5820/0729/files/48462978770.pdf
    • https://cdn.shopify.com/s/files/1/0438/7880/9755/files/dikizotakubokoxura.pdf
    • https://cdn.shopify.com/s/files/1/0434/4951/6199/files/iskender_pala_su_kasidesi.pdf
    • https://cdn.shopify.com/s/files/1/0429/6671/2479/files/39496408984.pdf
    • https://cdn.shopify.com/s/files/1/0433/7411/7015/files/gusezepegaga.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_off0000770c.bin
aab15480c485daca2febb1323fa760430fa58dede05f90f814c14f8f78782e1a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x770C 5204 bytes
font_01_sfnt_off000088c3.bin
c5f474e85f0e0b5ca9a572511d3dc7902f78ff917bf9464d512a6c9080a05c7e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x88C3 9896 bytes

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