Malicious PDF — malware analysis report

Static analysis result for SHA-256 9b6d7e9f70e18801…

MALICIOUS

PDF

49.9 KB Created: 2020-08-11 09:21:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ad1694cab91f6883794f15b2ee55d749 SHA-1: 52f50b9f7993107afdea1cbfd1afa7dc563d33eb SHA-256: 9b6d7e9f70e1880111b4a332df2df1b20cb2a8b26c4d033fce54657e4f2065bf
150 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 pointing to shopify.com domains, but one critical link directs to a known malicious redirector at ttraff.ru. This indicates a link farm attack pattern designed to obscure the final malicious destination. The ML classifier strongly supports the malicious nature of this PDF.

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.ru/pify?keyword=boer+goat+farming+pdf
    • http://files.doverchoirs.com/uploads/1/3/1/1/131163712/2728441.pdf
    • http://files.nageeray.studio/uploads/1/3/1/4/131455158/vagabibitibosivu.pdf
    • http://files.stampsrhistory.com/uploads/1/3/1/3/131381607/a430a771.pdf
    • https://cdn.shopify.com/s/files/1/0429/2801/3471/files/goduton.pdf
    • https://cdn.shopify.com/s/files/1/0435/1731/3176/files/mawubujosifav.pdf
    • https://cdn.shopify.com/s/files/1/0431/4939/4080/files/letedakevapefefutewa.pdf
    • https://cdn.shopify.com/s/files/1/0433/9925/0081/files/36970640974.pdf
    • https://cdn.shopify.com/s/files/1/0430/2739/8807/files/74787414631.pdf
    • https://cdn.shopify.com/s/files/1/0429/2496/6044/files/azar_intermediate_grammar.pdf
    • https://cdn.shopify.com/s/files/1/0432/3255/9263/files/d_d_5e_sorcerer_wild_magic.pdf
    • https://cdn.shopify.com/s/files/1/0440/2728/1558/files/ziketi.pdf
    • https://cdn.shopify.com/s/files/1/0434/0344/4380/files/suloviz.pdf
    • https://cdn.shopify.com/s/files/1/0437/1510/0822/files/runifux.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/walezilufotalenuzodumis.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_off000078cd.bin
ba292192271dd105516dfdd95a1d7b133d2eec3e03b3ba19eb0984e1bebe43bb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x78CD 4988 bytes
font_01_sfnt_off000089a7.bin
2f08598cf1bcd8b04a006649fe11300dba8bf788130c450122be4e782f78e9f0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x89A7 10336 bytes
font_02_sfnt_off0000ace2.bin
9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2		 pdf-font-stream PDF embedded font (sfnt) at offset 0xACE2 4324 bytes

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