Malicious PDF — malware analysis report

Static analysis result for SHA-256 969ec378fedcbdb2…

MALICIOUS

PDF

45.9 KB Created: 2020-09-16 17:36:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 02b6e71e549a4c4afc147195b8512d6b SHA-1: d7f5089b081dd83fa2ad98e45ff16cdcf13ff411 SHA-256: 969ec378fedcbdb290a02adaa4dc60c307ca62fdb0b5cbee58b72ca80d8c9e85
150 Risk Score

Malware Insights

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

The PDF file contains a malicious redirector link that points to 'ttraff.ru', which is known for hosting malicious content. The document body, though heavily obfuscated, contains the same URL, suggesting a lure to trick users into clicking it. The presence of numerous external PDF links, many pointing to benign-looking file hosting services, indicates a link farm designed to improve search engine ranking for the malicious content. 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.ru/wix?keyword=maladolescenza+full+movie+online+watch
    • http://files.channelreligion.com/uploads/1/3/0/7/130739704/fb46c068b7.pdf
    • http://files.ondre.com/uploads/1/3/0/9/130969935/6a03a8b782b167.pdf
    • https://a3f0be66-a022-4bbb-b5aa-3d88afbb0dc6.filesusr.com/ugd/e3c460_6949479b699f4cf897e6b6f730d5d400.pdf?index=true
    • https://0752870a-291c-4ea5-944a-5fbfa2128e2f.filesusr.com/ugd/ceb2e8_4d7cd2d7a7484ae2a1e18bbddd034348.pdf?index=true
    • https://6cc52831-9684-4fa7-b7ac-94064629f642.filesusr.com/ugd/145364_aaeffd51d88549768e8d59a2e4bac9b4.pdf?index=true
    • https://21eed9f5-a747-4823-a7ab-b08932be6a56.filesusr.com/ugd/38062a_c4fb78b0c4d640d3a65a9e88ae151a81.pdf?index=true
    • https://cdn.shopify.com/s/files/1/0437/8358/5949/files/38406781947.pdf
    • https://cdn.shopify.com/s/files/1/0428/3187/2166/files/40271629493.pdf
    • https://cdn.shopify.com/s/files/1/0465/1086/6582/files/formelle_anrede_englisch_mehrere_personen.pdf
    • https://cdn.shopify.com/s/files/1/0431/2681/6932/files/wawizorapufane.pdf
    • https://cdn.shopify.com/s/files/1/0429/9456/5271/files/musomobex.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_off00007489.bin
122d4d356076f271b1ee585861212e2a1400e2a7f4a46dba89c3cbee409e05ba		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7489 5372 bytes
font_01_sfnt_off000086d9.bin
d4884ffa5c4996c99520173ceee5b990c64d2d2f8b258612c7adc3763d74fb76		 pdf-font-stream PDF embedded font (sfnt) at offset 0x86D9 10828 bytes

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