Malicious PDF — malware analysis report

Static analysis result for SHA-256 9527d61e8b23a774…

MALICIOUS

PDF

44.3 KB Created: 2020-08-23 10:53:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4facf428200b61a53ecd42936ebd2553 SHA-1: 333330a0153a7067023451fe65bf8fe6879edf55 SHA-256: 9527d61e8b23a774f83209f946d67f2273689a9431d39b69a9023bac0a474596
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.001 Malicious Link T1059.001 PowerShell

The PDF contains a link farm designed to redirect users to malicious infrastructure, specifically advertising a 'Bitdefender antivirus apk full' download. The primary malicious URL identified is https://ttraff.cc/pify?keyword=bitdefender+antivirus+apk+full, which is a known redirector. The document body, though heavily obfuscated, contains references to this URL and other PDF files hosted on Shopify domains, suggesting a coordinated effort to distribute malware via deceptive links.

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.cc/pify?keyword=bitdefender+antivirus+apk+full
    • http://files.pianolessonsontheweb.com/uploads/1/3/1/4/131438137/04e859ce.pdf
    • http://files.cosmicbabies.org/uploads/1/3/1/4/131455283/jogafinosivo_vitil_foxewevi_dujupufoxabodos.pdf
    • https://cdn.shopify.com/s/files/1/0428/9154/2681/files/difosupopasewizuba.pdf
    • https://cdn.shopify.com/s/files/1/0434/6534/3126/files/rudirifibuwa.pdf
    • https://cdn.shopify.com/s/files/1/0427/7361/0663/files/robezulomezunudogabo.pdf
    • https://cdn.shopify.com/s/files/1/0433/5733/9807/files/zubugow.pdf
    • https://cdn.shopify.com/s/files/1/0434/6462/2242/files/vapeligasujugexugukatu.pdf
    • https://cdn.shopify.com/s/files/1/0427/6633/6167/files/24453665549.pdf
    • https://cdn.shopify.com/s/files/1/0435/4277/3914/files/vemezabafuda.pdf
    • https://cdn.shopify.com/s/files/1/0429/5881/5398/files/51946488166.pdf
    • https://cdn.shopify.com/s/files/1/0430/4899/2919/files/5030655312.pdf
    • https://cdn.shopify.com/s/files/1/0429/2821/0073/files/53225459518.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000059a9.bin
1fd29acc987e059fb78f1966a317e789dbf49faa16efc4decc4eb945d8a20044		 pdf-font-stream PDF embedded font (sfnt) at offset 0x59A9 5208 bytes
font_01_sfnt_off00006b73.bin
6a0d614aad5af8388e99d808736141a5328caceac12211a9c5c4e886c3b50c67		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6B73 10328 bytes
font_02_sfnt_off00008efd.bin
18f56b7fae04e07bc119a468ad323bdda099da77b0772854d1c47cc1f39b9f3b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8EFD 16144 bytes

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