Malicious PDF — malware analysis report

Static analysis result for SHA-256 c550fb9326890e64…

MALICIOUS

PDF

63.5 KB Created: 2020-08-06 17:09:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5d90943f878dad595b8de22a8bc0356d SHA-1: 6123afb77add3a537e63ebfbda74c21d0ce77cab SHA-256: c550fb9326890e646e675d9e399bd473c4fbcebdf46177dd5774e508475c1d10
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.001 User Execution: Malicious Link T1059.001 PowerShell

The PDF file contains numerous embedded links, with one heuristic specifically identifying a link to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains text related to 'occupational hazards in hospital pdf' and a URL that appears to be part of a link farm designed to attract search engine traffic. The primary malicious link identified is https://ttraff.com/pify?keyword=occupational+hazards+in+hospital+pdf, which is likely used to redirect the user to a malicious site.

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=occupational+hazards+in+hospital+pdf
    • http://files.cocoglowspraytans.ca/uploads/1/3/1/4/131453402/7489709.pdf
    • http://files.seratrevor.com/uploads/1/3/0/7/130740617/vivota_giliwaji_juposuvebo.pdf
    • http://files.fourlittleoneshilo.com/uploads/1/3/0/7/130776674/b06fe4d23a.pdf
    • http://files.safehavenucc.org/uploads/1/3/1/3/131380601/bamoripubawi_sibono_davoxile.pdf
    • http://files.pct4career.com/uploads/1/3/1/4/131410158/buzowewuwudesu.pdf
    • https://cdn.shopify.com/s/files/1/0431/3631/9639/files/82416779725.pdf
    • https://cdn.shopify.com/s/files/1/0435/2779/8943/files/99309181678.pdf
    • https://cdn.shopify.com/s/files/1/0439/3956/1630/files/levijigeror.pdf
    • https://cdn.shopify.com/s/files/1/0431/9064/8996/files/69677771802.pdf
    • https://cdn.shopify.com/s/files/1/0433/6707/1894/files/dalunajamekepivub.pdf
    • https://cdn.shopify.com/s/files/1/0431/7331/4715/files/dumelawomox.pdf
    • https://cdn.shopify.com/s/files/1/0433/0012/6885/files/the_pathophysiology_and_treatment_of_sepsis.pdf
    • https://cdn.shopify.com/s/files/1/0432/3459/0878/files/episiotomy_suturing.pdf
    • https://cdn.shopify.com/s/files/1/0428/4927/1975/files/xepepesarolex.pdf
    • https://cdn.shopify.com/s/files/1/0439/0102/6459/files/79616673184.pdf
    • https://cdn.shopify.com/s/files/1/0437/8145/6023/files/wolamumuzasugawuxafux.pdf
    • https://cdn.shopify.com/s/files/1/0435/6977/4750/files/60677129258.pdf
    • https://cdn.shopify.com/s/files/1/0435/1901/7124/files/22865245249.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_off0000ae43.bin
4b62acc431bd16e1f1abaadea1754b222ff953fab38fc9a08914598d9aa39031
pdf-font-stream PDF embedded font (sfnt) at offset 0xAE43 5320 bytes
font_01_sfnt_off0000c056.bin
15d69dde696248376cae1748c4267dfb21e99bc1c116e168ec1ebe034108efea
pdf-font-stream PDF embedded font (sfnt) at offset 0xC056 15220 bytes