Malicious PDF — malware analysis report

Static analysis result for SHA-256 a36009309b04e3c6…

MALICIOUS

PDF

42.0 KB Created: 2020-08-31 15:23:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9126ba27c14eb83604628aa6e3d91715 SHA-1: bad4675e6087ee81d6263a6baaa1650a3103b8e5 SHA-256: a36009309b04e3c6f8a1757d127522cbae34e594d451f09cf43230bfb84cdb65
120 Risk Score

Malware Insights

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

The PDF file contains a link that redirects to a malicious URL, likely as part of a lure to download unwanted software or engage in phishing. The document body and embedded URLs suggest a theme of providing modded applications, which is a common social engineering tactic. The PDF_MALICIOUS_REDIRECTOR_LINK heuristic firing confirms the presence of a link to known malicious infrastructure.

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/wix?keyword=asphalt+xtreme+mod+apk++for+android
    • https://cdn.shopify.com/s/files/1/0432/9819/3573/files/terukegaga.pdf
    • https://cdn.shopify.com/s/files/1/0433/4102/1334/files/23114349610.pdf
    • https://cdn.shopify.com/s/files/1/0441/2401/2696/files/cardiopatia_reumatica_inactiva.pdf
    • https://cdn.shopify.com/s/files/1/0431/3792/5269/files/mysql_you_are_using_safe_update_mode.pdf
    • https://cdn.shopify.com/s/files/1/0434/1281/6034/files/cease_and_desist_letter_south_africa.pdf
    • https://cdn.shopify.com/s/files/1/0437/1510/0840/files/53660858239.pdf
    • https://cdn.shopify.com/s/files/1/0433/1687/1333/files/wagtail_bird_information.pdf
    • https://cdn.shopify.com/s/files/1/0433/4272/5275/files/cardiovascular_physiology_lecture_notes.pdf
    • https://cdn.shopify.com/s/files/1/0428/9226/3583/files/dirijiguwajigid.pdf
    • https://cdn.shopify.com/s/files/1/0427/6230/5702/files/72623153757.pdf
    • https://cdn.shopify.com/s/files/1/0472/3143/4917/files/invitation_to_oceanography_7th_edition_download.pdf
    • https://cdn.shopify.com/s/files/1/0431/1659/3312/files/57996936579.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_off000065dd.bin
c85f24a028a3d97f7d03bc0acedd6a9e1c53ba1908f151d9276c7a3ae139f626		 pdf-font-stream PDF embedded font (sfnt) at offset 0x65DD 5400 bytes
font_01_sfnt_off00007816.bin
fe267c2bff9240f72dd01cab43650659a6992dfdee2d0f1d617c388923b81ff3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7816 10288 bytes

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