Malicious PDF — malware analysis report

Static analysis result for SHA-256 3f4d0b5804315d7f…

MALICIOUS

PDF

53.6 KB Created: 2020-07-27 01:06:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7c9a934816bb906f777e73600b775c2a SHA-1: e4f688fe9e3e6e4703e5c03809daa53ee27145cc SHA-256: 3f4d0b5804315d7f2bb1874d7ec07e63d511b8d81a902280144368961c9dcac3
128 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to ttraff.cc. Additionally, it exhibits characteristics of a link farm, with numerous embedded URLs, many of which are hosted on Shopify. The document body, though heavily obfuscated, contains text related to 'fastest android emulator for pc 2019', suggesting a lure. The presence of a 'download button' heuristic further supports the malicious intent of directing users to external resources.

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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=fastest+android+emulator+for+pc+2019
    • http://files.nzwfd.co.nz/uploads/1/3/2/6/132695602/votepexasiliv-lupagisali-dorum-potukunavez.pdf
    • http://files.chicouta.org/uploads/1/3/0/8/130813413/lovaserijazupusaxa.pdf
    • http://files.columbianacoc.com/uploads/1/3/1/6/131637163/8c35b74b.pdf
    • http://files.designmendola.com/uploads/1/3/0/7/130740512/xejuliwe_natofedunigumum.pdf
    • http://files.neverthelessshecomposed.org/uploads/1/3/0/8/130874148/dogotani.pdf
    • https://cdn.shopify.com/s/files/1/0432/8184/2341/files/zalotamigoxazusi.pdf
    • https://cdn.shopify.com/s/files/1/0428/7230/7875/files/zosisogedapasesej.pdf
    • https://cdn.shopify.com/s/files/1/0436/9498/1273/files/guxonosatitivugexosanebun.pdf
    • https://cdn.shopify.com/s/files/1/0430/7881/1810/files/domimoset.pdf
    • https://cdn.shopify.com/s/files/1/0429/6278/0311/files/bunegunipisemabedumuponez.pdf
    • https://cdn.shopify.com/s/files/1/0431/2537/5127/files/57041334993.pdf
    • https://cdn.shopify.com/s/files/1/0435/1698/5498/files/67117259016.pdf
    • https://cdn.shopify.com/s/files/1/0428/5179/5107/files/notebogibow.pdf
    • https://cdn.shopify.com/s/files/1/0434/1891/0870/files/redoziwarejipivaletow.pdf
    • https://cdn.shopify.com/s/files/1/0430/5109/0077/files/bunofugafunenezamumeti.pdf
    • https://cdn.shopify.com/s/files/1/0428/2833/3219/files/49967681519.pdf
    • https://cdn.shopify.com/s/files/1/0429/9830/0823/files/joxumajamelubugebidor.pdf
    • https://cdn.shopify.com/s/files/1/0432/0064/3236/files/tegifuramubuxiwimo.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_off00008930.bin
e357264b9f0bdc720c6b7b9038e1ea87869963a86cf9fb45688b52a641081db1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8930 5620 bytes
font_01_sfnt_off00009c28.bin
a36eee06fef6ce219692c4ec918276ac99413e4fd1e3666e4031624f9289d620		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9C28 1800 bytes
font_02_sfnt_off0000a4b5.bin
df9b74771b424d10c4f53d9198834c7723726108f5127dc5bae6cab0a18193b4		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA4B5 10420 bytes

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