Malicious PDF — malware analysis report

Static analysis result for SHA-256 2fd2d474d8d70b41…

MALICIOUS

PDF

74.5 KB Created: 2020-07-28 12:05:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: aa7e5ebb1bf379029ad40a78591fdde1 SHA-1: 18e0c68d7b828a30665d0e058175b389f817732e SHA-256: 2fd2d474d8d70b41b4696e68dca29368935caefd1c6118463233b8daaef58fc2
160 Risk Score

Malware Insights

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

The PDF contains a lure for an advance-fee scam, instructing the user to click a link. The embedded link points to a redirector, which is a common technique for delivering malicious payloads or phishing pages. The document body, though heavily obfuscated, contains references to 'Bikroy.com java app' and 'wkhtmltopdf', suggesting a potential delivery mechanism or context for the scam.

Heuristics 4

  • 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.
  • Advance-fee lottery/parcel scam lure high SE_ADVANCE_FEE_SCAM_LURE
    Document contains lottery/beneficiary or prize language together with large-value draft/funds wording and parcel/courier delivery requirements. This is a classic advance-fee fraud document shape.
  • 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=bikroy.+com+java+app
    • http://files.normannicholson.org/uploads/1/3/1/4/131452841/wusikumigo.pdf
    • http://files.shandeezcollectiv.com/uploads/1/3/1/6/131606486/baxunu.pdf
    • http://files.whatthesaintsknew.org/uploads/1/3/2/6/132682640/robij-dewopi-xuxas.pdf
    • http://files.zndaughtersdance.com/uploads/1/3/1/8/131856409/1913828.pdf
    • http://files.paulettesart.com/uploads/1/3/1/3/131398406/c5eae3.pdf
    • https://cdn.shopify.com/s/files/1/0429/2355/7030/files/jewutimamiwonasetesemom.pdf
    • https://cdn.shopify.com/s/files/1/0428/4760/0807/files/69407574963.pdf
    • https://cdn.shopify.com/s/files/1/0433/7709/8910/files/gukaxifevikotekesek.pdf
    • https://cdn.shopify.com/s/files/1/0429/4171/0499/files/6906361673.pdf
    • https://cdn.shopify.com/s/files/1/0434/7353/5138/files/xaxukuwenokufipap.pdf
    • https://cdn.shopify.com/s/files/1/0434/6845/6086/files/dedewagapewamijilefu.pdf
    • https://cdn.shopify.com/s/files/1/0433/1087/4777/files/70353658479.pdf
    • https://cdn.shopify.com/s/files/1/0433/7870/4549/files/savokenufopur.pdf
    • https://cdn.shopify.com/s/files/1/0432/2590/7368/files/35255020194.pdf
    • https://cdn.shopify.com/s/files/1/0440/3914/3574/files/40647838607.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_off0000b064.bin
ad0383d9cb25fcf1932e5d09dddd42ae424231127fe7116934e32cc26b4ce852
pdf-font-stream PDF embedded font (sfnt) at offset 0xB064 4736 bytes
font_01_sfnt_off0000c07c.bin
ef1f17cfac119c669d31f2689d7227f6e994407ba84a93267b1854f25eed2874
pdf-font-stream PDF embedded font (sfnt) at offset 0xC07C 18528 bytes
font_02_sfnt_off0000f754.bin
98aa08f847a897fea67ffbf2f3bd8b357bcbe5cb1aa86533476aeebf1da4bd10
pdf-font-stream PDF embedded font (sfnt) at offset 0xF754 10976 bytes