Malicious PDF — malware analysis report

Static analysis result for SHA-256 fc40b3293db42aba…

MALICIOUS

PDF

57.2 KB Created: 2020-08-03 13:02:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 70b114f8a042c5c9b39fc2827227f802 SHA-1: 4022f9b3538fc3c539477d5fc38a4848af46e83e SHA-256: fc40b3293db42aba0bfd9b0290382c0e168b341f89056a452004c783339f4730
120 Risk Score

Malware Insights

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

The PDF contains multiple embedded URLs, with a critical heuristic firing for PDF_MALICIOUS_REDIRECTOR_LINK pointing to 'https://ttraff.ru/pify?keyword=sao+bernardo+graciliano+ramos+pdf+download'. Another critical heuristic, PDF_SEO_LINK_FARM, indicates the PDF is part of a link farm, likely to manipulate search engine results. The document body text, though heavily obfuscated, contains the same suspicious URL, reinforcing the lure.

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=sao+bernardo+graciliano+ramos+pdf+download
    • http://files.thefreckledpeddler.com/uploads/1/3/1/3/131378990/didavesubu-dujoz-zinugo.pdf
    • http://files.curiouscreativecritical.com/uploads/1/3/1/0/131070072/8991190.pdf
    • http://files.bellavistadentistry.com/uploads/1/3/1/1/131164431/famikuranuxirap_nofofovidumu.pdf
    • http://files.masterj.org/uploads/1/3/0/9/130968921/564243.pdf
    • https://cdn.shopify.com/s/files/1/0427/8360/4903/files/rizalozavut.pdf
    • https://cdn.shopify.com/s/files/1/0432/9452/3552/files/orc_and_pie.pdf
    • https://cdn.shopify.com/s/files/1/0433/0881/0398/files/99840129622.pdf
    • https://cdn.shopify.com/s/files/1/0434/5836/3544/files/ziwezovu.pdf
    • https://cdn.shopify.com/s/files/1/0433/9977/4366/files/lulojikifunotiwej.pdf
    • https://cdn.shopify.com/s/files/1/0432/3511/5176/files/91643978702.pdf
    • https://cdn.shopify.com/s/files/1/0431/8488/1825/files/ruvagerevefabotegut.pdf
    • https://cdn.shopify.com/s/files/1/0431/5624/2581/files/79302394664.pdf
    • https://cdn.shopify.com/s/files/1/0440/8773/8533/files/87133550682.pdf
    • https://cdn.shopify.com/s/files/1/0431/9592/4640/files/naxozinefunufotu.pdf
    • https://cdn.shopify.com/s/files/1/0435/6797/2515/files/lobajub.pdf
    • https://cdn.shopify.com/s/files/1/0434/7097/9237/files/sagawegopawutedapixaxaziw.pdf
    • https://cdn.shopify.com/s/files/1/0437/3394/2423/files/fodumukakibebogojurad.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_off00009e07.bin
52b22b512a304637cd9f90625af4e7b10c3908923cd9f50953bb2d1a7bf92b76		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9E07 5812 bytes
font_01_sfnt_off0000b1c3.bin
585ab8685970abc8ebb37d4cfdb9c71b435fb3d9dbd0ede674a4808a2aacf5aa		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB1C3 11016 bytes

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