Malicious PDF — malware analysis report

Static analysis result for SHA-256 34eb48291257975e…

MALICIOUS

PDF

37.4 KB Created: 2020-08-02 04:58:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 99da8095acf2f09f58fb0117be3e6aac SHA-1: 22dd3d8002d894f7eb1fc05332c335e8f9f97b17 SHA-256: 34eb48291257975e27e7e4566992ae9c64b6606d68652437caa3f0a45d3cb920
150 Risk Score

Malware Insights

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

The PDF contains a link farm with numerous external links, many pointing to Shopify domains hosting PDF files. One critical heuristic identified a link to a known malicious redirector at 'ttraff.com', which likely serves as the initial lure. The ML classifier strongly supports the malicious nature of this PDF. The presence of a link farm and a malicious redirector suggests the document's purpose is to lead users to malicious content, potentially for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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=prentice+hall+literature+pdf
    • http://files.fbchurch.ca/uploads/1/3/1/4/131483830/870f3564c7892.pdf
    • http://files.eam-studio.com/uploads/1/3/1/4/131452902/2306952.pdf
    • http://files.projecteva.org/uploads/1/3/2/7/132740185/sufiduzevovezamogot.pdf
    • http://files.swtradingcompany.com/uploads/1/3/0/7/130775537/a58ed09f09d0df.pdf
    • https://cdn.shopify.com/s/files/1/0437/9194/1781/files/robert_half_timesheets.pdf
    • https://cdn.shopify.com/s/files/1/0433/0602/5128/files/levejaz.pdf
    • https://cdn.shopify.com/s/files/1/0431/6761/3090/files/disexewut.pdf
    • https://cdn.shopify.com/s/files/1/0428/6359/1583/files/devuxovepowu.pdf
    • https://cdn.shopify.com/s/files/1/0430/5901/9933/files/8417785040.pdf
    • https://cdn.shopify.com/s/files/1/0431/9074/7295/files/megizafewiwesane.pdf
    • https://cdn.shopify.com/s/files/1/0437/8319/2738/files/elementary_number_theory_burton.pdf
    • https://cdn.shopify.com/s/files/1/0434/1760/0152/files/nividivajenikurefile.pdf
    • https://cdn.shopify.com/s/files/1/0433/6209/1163/files/jekaxusejakuxi.pdf
    • https://cdn.shopify.com/s/files/1/0428/7086/6076/files/xegigopajodegunawabakoze.pdf
    • https://cdn.shopify.com/s/files/1/0433/0091/3310/files/tuvix.pdf
    • https://cdn.shopify.com/s/files/1/0444/5110/2887/files/cub_cadet_1000_series.pdf
    • https://cdn.shopify.com/s/files/1/0428/5608/7708/files/jebapamurinodepimuli.pdf
    • https://cdn.shopify.com/s/files/1/0428/4334/0956/files/86146234406.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000047ea.bin
cae16865011e6f85010d7a5064ca94ad10db50046bb4f41827d05c424650146d
pdf-font-stream PDF embedded font (sfnt) at offset 0x47EA 4840 bytes
font_01_sfnt_off00005844.bin
a79b62711c8c2bfa7386ac017d91c0f00af8aea0295d28be4854e4e877a0b050
pdf-font-stream PDF embedded font (sfnt) at offset 0x5844 9956 bytes
font_02_sfnt_off00007a68.bin
0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333
pdf-font-stream PDF embedded font (sfnt) at offset 0x7A68 4324 bytes