Malicious PDF — malware analysis report

Static analysis result for SHA-256 5be9dd849b48cbc1…

MALICIOUS

PDF

46.2 KB Created: 2020-08-28 09:20:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 61196491d26d378b96fef34540d71f88 SHA-1: 703e61804ca8fcf3cdbe17b58504f2cbea768a4a SHA-256: 5be9dd849b48cbc18330178c77a748cb34bde32fad9a0790bfda69f29581b492
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous links, with a critical heuristic firing indicating it's a malicious redirector. The primary malicious URL, 'https://ttraff.ru/pify?keyword=geometric+tattoo+template', is likely intended to lead the user to a malicious site. The document body, though heavily obfuscated, contains the same URL, reinforcing its purpose as a lure. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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=geometric+tattoo+template
    • http://files.westminsterconcrete.org/uploads/1/3/1/4/131408432/mevokimekituwup-rufiw-butifu-konam.pdf
    • http://files.thedevilsdispatch.com/uploads/1/3/2/3/132302718/jireso.pdf
    • http://files.austinsbestphotobooths.com/uploads/1/3/0/8/130873708/nulawi.pdf
    • http://files.mrsararadian.com/uploads/1/3/1/4/131453676/725d0ad5d8b20d.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/50398535586.pdf
    • https://cdn.shopify.com/s/files/1/0432/1142/3902/files/gadibibarisadizewikeko.pdf
    • https://cdn.shopify.com/s/files/1/0438/9660/2779/files/fekexofe.pdf
    • https://cdn.shopify.com/s/files/1/0435/5971/4971/files/dolebibiba.pdf
    • https://cdn.shopify.com/s/files/1/0447/8251/8421/files/has_been_has_gone_exercises.pdf
    • https://cdn.shopify.com/s/files/1/0431/7731/2405/files/hotel_credit_card_authorization_form_hampton_inn.pdf
    • https://cdn.shopify.com/s/files/1/0437/2630/7480/files/recuva_gratis_en_espaol.pdf
    • https://cdn.shopify.com/s/files/1/0431/9110/7752/files/fegiwalop.pdf
    • https://cdn.shopify.com/s/files/1/0439/0918/5688/files/aliens_colonial_marines_technical_manual_download.pdf
    • https://cdn.shopify.com/s/files/1/0434/5066/3073/files/dupujemove.pdf
    • https://cdn.shopify.com/s/files/1/0437/3286/1079/files/mathematical_modelling_journal.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007904.bin
21d22f7f336cd6c95c1a6d62ee9495e9dd32ded9652de229a33a4b5f6733976c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7904 4932 bytes
font_01_sfnt_off000089b6.bin
171c6bb5182594d04304e1ea977396934a97fd5a6e39bd80c29545390756299f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x89B6 10120 bytes

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