Malicious PDF — malware analysis report

Static analysis result for SHA-256 cbf578fb99ad766f…

MALICIOUS

PDF

40.2 KB Created: 2020-08-28 06:33:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: abc6dae9b0a8c683f572bf4b7d158ca2 SHA-1: aadd0916696289fe2ecc7814dc4bb5ee38365421 SHA-256: cbf578fb99ad766f88d96d6395fa9ef4c4ed0f3124d04931b702b0999569063c
150 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.cc, which is likely used to deliver further malicious content. The document body, though heavily obfuscated, contains the same movie title as the URL, suggesting a lure to entice users to click the malicious link. The presence of numerous other PDF links, many hosted on Shopify, indicates a link farm strategy to improve search engine ranking and visibility for the malicious content.

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.cc/pify?keyword=alvin+ve+sincaplar+3+full+izle
    • http://nafazo.charmed-liebling.com/uploads/1/3/1/3/131384306/1179549.pdf
    • http://balirova.wildoncherrysalon.com/uploads/1/3/1/8/131856124/xusakefi-bituvadom.pdf
    • https://cdn.shopify.com/s/files/1/0433/2473/5643/files/92331892928.pdf
    • https://cdn.shopify.com/s/files/1/0428/7420/8415/files/nokuvo.pdf
    • https://cdn.shopify.com/s/files/1/0430/7625/5897/files/chaalbaaz_movie_video_song.pdf
    • https://cdn.shopify.com/s/files/1/0430/3113/4365/files/98589958150.pdf
    • https://cdn.shopify.com/s/files/1/0437/1149/6343/files/thyroid_storm_guideline_malaysia.pdf
    • https://cdn.shopify.com/s/files/1/0430/4646/9793/files/bixavaxe.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/texojorigerusoxuduk.pdf
    • https://cdn.shopify.com/s/files/1/0433/6146/8567/files/47893873329.pdf
    • https://cdn.shopify.com/s/files/1/0440/6778/2821/files/anti_politics_machine.pdf
    • https://cdn.shopify.com/s/files/1/0457/8276/1628/files/nadaguides_classic_car_value.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_off00004fa0.bin
4728a7f43dbad39d22f26a3b387a1b56f743e089c9d395924ce1ce359af2cf0b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4FA0 4964 bytes
font_01_sfnt_off0000608a.bin
a5a79fe8186570e9eb2d8bfcfcb5157764324d34ed98234c0a7e9462c92567e9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x608A 11372 bytes
font_02_sfnt_off0000843b.bin
0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333		 pdf-font-stream PDF embedded font (sfnt) at offset 0x843B 4324 bytes

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