Malicious PDF — malware analysis report

Static analysis result for SHA-256 94acfebb706ba12c…

MALICIOUS

PDF

35.6 KB Created: 2020-09-28 19:27:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3c9e06351d7fd864f37c33c58a2a77cd SHA-1: bfb52490a3b9de35733715563f0b3bfc27c819c1 SHA-256: 94acfebb706ba12c2d5883cd2f9b463c646fb9d4969b2562604bc79e559d18b2
120 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, with critical heuristics indicating it is a malicious redirector and part of a link farm. The primary malicious URL identified is https://cctraff.ru/mozel?keyword=cfl+stats+pdf, which likely serves as a gateway to further malicious content. The document body, though heavily obfuscated, also contains this URL and other links pointing to mozfiles.com domains, suggesting a coordinated effort to drive traffic to potentially harmful sites.

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://cctraff.ru/mozel?keyword=cfl+stats+pdf
    • https://site-1036649.mozfiles.com/files/1036649/bezavimabosuja.pdf
    • https://site-1037003.mozfiles.com/files/1037003/44295619521.pdf
    • https://site-1037086.mozfiles.com/files/1037086/fedatux.pdf
    • https://site-1036751.mozfiles.com/files/1036751/60357557688.pdf
    • https://site-1037054.mozfiles.com/files/1037054/83805466897.pdf
    • http://files.mbstoneman.com/uploads/1/3/0/7/130775741/cd27b1af2702f9e.pdf
    • http://files.donmelnychuk.com/uploads/1/3/1/1/131164066/detiledikoxuzemosa.pdf
    • http://files.crafteli.com/uploads/1/3/0/7/130775970/1574814.pdf
    • http://nunoba.beepeeking.com/uploads/1/3/2/6/132695384/ziboderemabowobujani.pdf
    • http://files.oh-fuji.com/uploads/1/3/1/4/131454581/3019223.pdf
    • https://cdn.shopify.com/s/files/1/0462/3840/0661/files/good_answers_to_what_are_your_weaknesses.pdf
    • https://5a206e45-26c5-43c1-8502-b6232b7c7bbf.filesusr.com/ugd/41a0b6_fabc359706714aa494bd574012352382.pdf?index=true
    • https://56ad8ce7-c57f-48b7-b5c3-c79254ff9f5c.filesusr.com/ugd/b0c8dc_048ddf7f187042ffa9014c8ba1c95e32.pdf?index=true
    • https://24b0545d-4426-4015-b0d5-9658cabc6e47.filesusr.com/ugd/7ea8bb_0277d444979244199befb709a1fd43d5.pdf?index=true
    • https://af13b1cf-bb51-42be-a9fe-d4c9d92aa0ee.filesusr.com/ugd/5c7528_fb3240276a8841b382e7075149cc6b38.pdf?index=true
    • 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_off00004ed7.bin
9e45af209b7eeb988f5fbf5428a375fc9d939c5c81d9e862a7c0b0ba0f4f931a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4ED7 4844 bytes
font_01_sfnt_off00005f66.bin
a48d0e936a8de7adf44c23e3215b3f468d04a3b57358ed9ef2877875d9074061		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5F66 10180 bytes

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