Malicious PDF — malware analysis report

Static analysis result for SHA-256 ecff0db7a6ecb8a8…

MALICIOUS

PDF

38.1 KB Created: 2020-08-11 13:06:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4cd7ecc31894709c9a07b45cdeb758f5 SHA-1: dba188061e18b10b2bb975cc9ecad0e4513fc148 SHA-256: ecff0db7a6ecb8a8802ce4a96258cef3b5aaef7e3b8fcd14d29428af18213223
120 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to external PDF files hosted on various domains. One critical heuristic identified a link to a known malicious redirector, ttraff.cc, which is likely used to obscure the final destination. The document body, though heavily obfuscated, contains the same malicious redirector URL and a seemingly benign Shopify URL, suggesting a lure to trick users into clicking through to potentially malicious content. The presence of a mass link farm indicates an attempt to manipulate search engine results or to overwhelm the user with choices, leading them to click on a malicious link.

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.cc/pify?keyword=effective+technical+communication+anne+eisenberg+pdf
    • http://files.stepsforsarcomaevent.com/uploads/1/3/1/6/131637402/towarumelutip.pdf
    • http://fixilepo.presscourier.org/uploads/1/3/0/7/130775085/woreritajemof-mojodadegizir-jopoke-dapalepupesu.pdf
    • http://daxoxaz.friendsofthedogs.org.uk/uploads/1/3/2/7/132712615/wabefatabufisajefale.pdf
    • http://vupuko.sumatanga.org/uploads/1/3/2/7/132740405/e711200aa27.pdf
    • http://files.elkhornvalleydistrict.org/uploads/1/3/2/6/132695829/019a11a2.pdf
    • https://cdn.shopify.com/s/files/1/0434/4581/3413/files/business_environment_and_concepts_bec.pdf
    • https://cdn.shopify.com/s/files/1/0432/4425/7442/files/mobefusaju.pdf
    • https://cdn.shopify.com/s/files/1/0432/0732/7904/files/minecraft_guns_texture_pack.pdf
    • https://cdn.shopify.com/s/files/1/0434/3041/2454/files/29419398960.pdf
    • https://cdn.shopify.com/s/files/1/0435/1007/1448/files/perudidilim.pdf
    • https://cdn.shopify.com/s/files/1/0428/4186/6403/files/vavovibawalubipiriv.pdf
    • https://cdn.shopify.com/s/files/1/0434/0586/9213/files/watamozigaledimo.pdf
    • https://cdn.shopify.com/s/files/1/0439/3605/5454/files/resident_evil_survivor_2.pdf
    • https://cdn.shopify.com/s/files/1/0433/8935/4149/files/good_snacks_for_diabetics.pdf
    • https://cdn.shopify.com/s/files/1/0434/0737/6542/files/94425926141.pdf
    • https://cdn.shopify.com/s/files/1/0432/2168/0283/files/4492281914.pdf
    • https://cdn.shopify.com/s/files/1/0430/6200/1821/files/jamevemuvimomima.pdf
    • https://cdn.shopify.com/s/files/1/0430/2703/8371/files/juzedezanuverezimukute.pdf
    • https://cdn.shopify.com/s/files/1/0432/0083/9842/files/lexinuxufo.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_off0000566d.bin
524de39644a7bf1feec454a41a6f3cdc7dd7689e87c0976f6589a5988ab41ac5
pdf-font-stream PDF embedded font (sfnt) at offset 0x566D 5724 bytes
font_01_sfnt_off000069b5.bin
035d9e53ea4d46d43414760be90b41658b56503c9304c7d354368a88c45b4aa3
pdf-font-stream PDF embedded font (sfnt) at offset 0x69B5 9704 bytes