Malicious PDF — malware analysis report

Static analysis result for SHA-256 ce8a772ca4b1e249…

MALICIOUS

PDF

33.1 KB Created: 2020-08-11 17:17:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 794018e84d6bc74603768418dc0ff3e8 SHA-1: 81396b54b9f49697938c3b0f31dd8f81211d4af8 SHA-256: ce8a772ca4b1e2491bb1915f102854fef8bf0dc95f1e00ac3e14963770d25df9
120 Risk Score

Malware Insights

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

The PDF contains a link that redirects to malicious infrastructure, as indicated by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body and embedded URLs suggest a lure for a free book download, which is a common social engineering tactic. The PDF_SEO_LINK_FARM heuristic indicates a large number of outbound links, many of which are hosted on Shopify, likely to appear legitimate while masking the malicious redirector.

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=critical+reasoning+and+the+art+of+argumentation+pdf+free+download
    • http://files.salve-eebee.com/uploads/1/3/0/8/130814085/susodolus-norukugukobe-xalulab-weruwimux.pdf
    • http://files.thirstquencherneckware.com/uploads/1/3/2/6/132695492/836b264c1.pdf
    • http://files.annielanedesign.com/uploads/1/3/1/4/131453682/jexizesufara_varusugokipa.pdf
    • https://cdn.shopify.com/s/files/1/0435/8589/6609/files/vewufiro.pdf
    • https://cdn.shopify.com/s/files/1/0431/0306/0128/files/wofexepenijeragema.pdf
    • https://cdn.shopify.com/s/files/1/0434/5161/3334/files/munutesupobudilo.pdf
    • https://cdn.shopify.com/s/files/1/0429/9803/8679/files/goviripidibev.pdf
    • https://cdn.shopify.com/s/files/1/0429/6769/5509/files/denepatawulader.pdf
    • https://cdn.shopify.com/s/files/1/0434/8359/4909/files/bepipumino.pdf
    • https://cdn.shopify.com/s/files/1/0432/4576/4770/files/consonant_and_vowel_chart.pdf
    • https://cdn.shopify.com/s/files/1/0440/6021/3398/files/loxinifejolitojamakal.pdf
    • https://cdn.shopify.com/s/files/1/0429/7415/0809/files/majawikufu.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_off00004316.bin
102e0a124ba3636a9180b6afb697d390fa51aeeef5056eeeeaf652b0e1ca6d28		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4316 5564 bytes
font_01_sfnt_off000055dc.bin
51cdcf44db5e04587fce8b4638a9be55b319add4cf212fb59e29514608458865		 pdf-font-stream PDF embedded font (sfnt) at offset 0x55DC 9824 bytes

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