Malicious PDF — malware analysis report

Static analysis result for SHA-256 3b9a14df845d33c0…

MALICIOUS

PDF

39.1 KB Created: 2020-08-19 09:08:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6ab50b046a3e37becb998668700890c2 SHA-1: 2c5484e2accc57ac5cf0c20ea4ca2b03cbfa05fc SHA-256: 3b9a14df845d33c0682b9015f010e4a1f88baf7d4eec331d1351d83df7039a27
120 Risk Score

Malware Insights

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

The PDF contains a link farm and a specific URL pointing to a known malicious redirector. The document body, though heavily obfuscated, contains the string 'sabbatical leave report sample' and the malicious URL, suggesting a lure to a phishing or malware distribution site. The presence of numerous links to Shopify-hosted PDFs indicates a link farm used for SEO poisoning or traffic redirection.

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=sabbatical+leave+report+sample
    • http://makewo.pyester.com/uploads/1/3/1/4/131438464/3867011.pdf
    • http://mudaso.theoutcomemusic.com/uploads/1/3/1/3/131398020/xuzemefenufaf_suposavu.pdf
    • http://wowedoma.avayogabodywear.com/uploads/1/3/2/6/132683031/356013.pdf
    • https://cdn.shopify.com/s/files/1/0432/5962/5627/files/suxiwiladil.pdf
    • https://cdn.shopify.com/s/files/1/0431/1446/3386/files/likoxodezowezumamifefemon.pdf
    • https://cdn.shopify.com/s/files/1/0433/5524/2655/files/98471981307.pdf
    • https://cdn.shopify.com/s/files/1/0428/3393/6547/files/72232117786.pdf
    • https://cdn.shopify.com/s/files/1/0428/0470/7491/files/99568895252.pdf
    • https://cdn.shopify.com/s/files/1/0429/4351/2732/files/engineering_c_programming_notes.pdf
    • https://cdn.shopify.com/s/files/1/0430/7684/5728/files/58957649615.pdf
    • https://cdn.shopify.com/s/files/1/0429/7208/6423/files/gapaxirijimesivozar.pdf
    • https://cdn.shopify.com/s/files/1/0445/6588/9188/files/accept_attribute_in_input_file_for.pdf
    • https://cdn.shopify.com/s/files/1/0431/1416/8480/files/20670801288.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_off00005bce.bin
dc0623ba4db0292d3f2309b10a33f355d765a9f227b3b63b71c03b3390ab1db9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5BCE 5380 bytes
font_01_sfnt_off00006df9.bin
8dd298dd5553511d08ec6311718438af9ecc90342c283b680bd0d8050b450787		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6DF9 9872 bytes

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