Malicious PDF — malware analysis report

Static analysis result for SHA-256 a93acd8dda8c685e…

MALICIOUS

PDF

42.6 KB Created: 2020-08-21 13:43:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7021be73a7373d1a3f9386c44b73da18 SHA-1: ab13854e0b1f6b983f033570176fceacd2275747 SHA-256: a93acd8dda8c685e86faab5e087a61ac297b90f371801beddfbc54e081dcce03
120 Risk Score

Malware Insights

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

The PDF file contains a link that redirects to a malicious domain, identified by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body, though heavily obfuscated, contains the string "Going bananas ielts answers" and the malicious URL, suggesting a lure to trick users into clicking the link. The PDF_SEO_LINK_FARM heuristic indicates the presence of numerous links, likely for SEO manipulation or to obscure 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.com/pify?keyword=going+bananas+ielts+answers
    • http://files.hyperlexiabtb.com/uploads/1/3/1/4/131453943/2782548.pdf
    • https://cdn.shopify.com/s/files/1/0430/9309/8660/files/40887006609.pdf
    • https://cdn.shopify.com/s/files/1/0441/4413/2248/files/55311999317.pdf
    • https://cdn.shopify.com/s/files/1/0438/1258/5634/files/gujarat_samachar_news_paper_today_bhavnagar_download.pdf
    • https://cdn.shopify.com/s/files/1/0429/8774/9529/files/visosuxupoduxapororeru.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/xeniwepisovera.pdf
    • https://cdn.shopify.com/s/files/1/0431/8907/6117/files/warsaw_pact_ground_forces.pdf
    • https://cdn.shopify.com/s/files/1/0436/4333/8912/files/file_auto_insurance_claim_without_police_report.pdf
    • https://cdn.shopify.com/s/files/1/0434/4093/0983/files/wegawovomaputubarap.pdf
    • https://cdn.shopify.com/s/files/1/0431/3861/3399/files/16122201538.pdf
    • https://cdn.shopify.com/s/files/1/0429/1392/3228/files/xutini.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/
    • https://cdn.shopify.com/s/files/1/04

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000626c.bin
d351cd29ac69a38f093fcdcbd17ce369893f43e5a8cea9b6f2ff3ffb4ac31881		 pdf-font-stream PDF embedded font (sfnt) at offset 0x626C 5116 bytes
font_01_sfnt_off000073f6.bin
2b02229db58e168b52035b749c6edc24aeb9c295044ec11a5e2fe97b1d793356		 pdf-font-stream PDF embedded font (sfnt) at offset 0x73F6 13520 bytes

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