Malicious PDF — malware analysis report

Static analysis result for SHA-256 3d6937962d7a7dbf…

MALICIOUS

PDF

57.8 KB Created: 2020-08-25 07:47:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a1ef6e16c560841a99641fc080be1cf3 SHA-1: 9370eca94eb8d9348f6746898ec0ddcc5fcb58c0 SHA-256: 3d6937962d7a7dbfbddaa4277d61a265805820a06d2260a2d686585a6eabbc04
150 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with one identified as a malicious redirector. The primary malicious link, 'https://ttraff.com/pify?keyword=jay-+z+the+blueprint+free', is a critical finding. The document also features a link farm, suggesting an attempt to manipulate search engine results or distribute content broadly. The ML classifier strongly supports the malicious nature of this PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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=jay-+z+the+blueprint+free
    • http://files.alanbirtwistle.com/uploads/1/3/1/3/131383664/werox_xapedewero_bemidituziv_zurer.pdf
    • https://cdn.shopify.com/s/files/1/0428/2168/1315/files/fisanesolinonawaj.pdf
    • https://cdn.shopify.com/s/files/1/0431/4877/1488/files/69028048786.pdf
    • https://cdn.shopify.com/s/files/1/0427/9474/6023/files/nuxusepumidof.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/29025511016.pdf
    • https://cdn.shopify.com/s/files/1/0439/5529/0270/files/31877200527.pdf
    • https://cdn.shopify.com/s/files/1/0447/9034/9975/files/group_1_car_seat_guidelines.pdf
    • https://cdn.shopify.com/s/files/1/0430/9513/0266/files/save_bitmap_image_in_sdcard_android.pdf
    • https://cdn.shopify.com/s/files/1/0432/8577/4502/files/93674823286.pdf
    • https://cdn.shopify.com/s/files/1/0431/5293/3021/files/40911494767.pdf
    • https://cdn.shopify.com/s/files/1/0428/2069/8268/files/sazavupixegulin.pdf
    • https://cdn.shopify.com/s/files/1/0429/8709/4177/files/xitov.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_off00009752.bin
85b0fc391cc817829be321bcff9c7ab39b0aed891614e7feb3268a363da2ef80		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9752 5124 bytes
font_01_sfnt_off0000a8cd.bin
5f93300369bf5e668bae71583c4c2be28319a23f13f84a0fb3346afbe2416d09		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA8CD 16212 bytes

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