Malicious PDF — malware analysis report

Static analysis result for SHA-256 b15e4526613d3917…

MALICIOUS

PDF

42.6 KB Created: 2020-08-07 07:38:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3add7aef71a4f1140418cc42ef19ff9d SHA-1: 606c35db6c5e78c094c0add59cc12c74c342a624 SHA-256: b15e4526613d3917ce1cf994afeed757ba8f2380636de4c86e7ac28e97deb09b
120 Risk Score

Malware Insights

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

The PDF file contains a link farm designed to mimic search engine results for educational materials, a common lure for phishing or malware distribution. The primary malicious link, 'https://ttraff.ru/pify?keyword=cambridge+primary+mathematics+learner+s+book+1+pdf+download', is identified as a redirector to potentially harmful content. The document body, though heavily obfuscated, contains references to the search query and the malicious URL, reinforcing the attack pattern.

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/pify?keyword=cambridge+primary+mathematics+learner+s+book+1+pdf+download
    • http://files.jackiehelderdesigns.com/uploads/1/3/2/7/132712326/jupar.pdf
    • http://rujupiniz.ffontheclock.com/uploads/1/3/0/9/130969762/kiwuvumotobib.pdf
    • http://files.ncbbq4u.com/uploads/1/3/1/3/131398292/1689856.pdf
    • http://files.dylanlipke.com/uploads/1/3/2/6/132682070/nokogituwizox_remate_xipuwotesukes.pdf
    • https://cdn.shopify.com/s/files/1/0431/6492/6111/files/servidor_web.pdf
    • https://cdn.shopify.com/s/files/1/0432/5271/1586/files/voporepolaronovemozinovim.pdf
    • https://cdn.shopify.com/s/files/1/0429/6772/8279/files/69448489161.pdf
    • https://cdn.shopify.com/s/files/1/0429/1405/4300/files/31725161154.pdf
    • https://cdn.shopify.com/s/files/1/0435/9628/4062/files/nitrogen_cycle_ncert.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/zorosibal.pdf
    • https://cdn.shopify.com/s/files/1/0430/6108/4322/files/9260964669.pdf
    • https://cdn.shopify.com/s/files/1/0439/1639/4648/files/3080867625.pdf
    • https://cdn.shopify.com/s/files/1/0428/5494/0828/files/29915639233.pdf
    • https://cdn.shopify.com/s/files/1/0435/5325/9679/files/83498699641.pdf
    • https://cdn.shopify.com/s/files/1/0433/0618/8955/files/2557748618.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_off0000490b.bin
2ce45d98c4a73b91eb0c3bcc3cf9f5ec8d7b95581c4aeaca5cd62b3f21863240		 pdf-font-stream PDF embedded font (sfnt) at offset 0x490B 5924 bytes
font_01_sfnt_off00005d1d.bin
b7d556d500ffede7ab53c1dc6831ddc4dc727572b0debc56651e67cdac07a056		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5D1D 13252 bytes
font_02_sfnt_off0000879b.bin
a95eff378c135b1ab40d10b3cd1da1bafbc07f86005f57898d079c90d712ddbd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x879B 16204 bytes

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