Malicious PDF — malware analysis report

Static analysis result for SHA-256 a0abd878bc5c3b98…

MALICIOUS

PDF

58.5 KB Created: 2020-08-21 11:15:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: fc6412377d484b494c59527bdf70e038 SHA-1: a2347f6fa801c50f28021717d1c4dc171fa5bff3 SHA-256: a0abd878bc5c3b9836064f7d3c1bb80e90de170763a1a843d2d172422cc40f31
152 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, many pointing to suspicious or unknown domains, designed to redirect users to malicious content. One critical heuristic identified a link to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains a reference to the malicious URL, suggesting a lure to download or view content related to 'Bahubali 2 songs mp4 telugu'. The ML classifier strongly supports the malicious nature of this PDF.

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.com/pify?keyword=bahubali+2+songs++mp4+telugu
    • http://zexojesig.trstainless.com/uploads/1/3/1/4/131438379/57df2.pdf
    • http://romamobik.lolas-ecec.org/uploads/1/3/0/9/130969754/9508391.pdf
    • http://files.stowinfo.co.uk/uploads/1/3/0/7/130740586/a929eb03604f3.pdf
    • http://nased.saharasistasols.com/uploads/1/3/2/8/132814930/5135927.pdf
    • https://cdn.shopify.com/s/files/1/0434/6383/5814/files/desktop_tablet_mobile.pdf
    • https://cdn.shopify.com/s/files/1/0429/0599/3375/files/86474653632.pdf
    • https://cdn.shopify.com/s/files/1/0431/9451/5614/files/werugekemifizuwerur.pdf
    • https://cdn.shopify.com/s/files/1/0432/2469/4939/files/18779242144.pdf
    • https://cdn.shopify.com/s/files/1/0434/9945/4628/files/kafipuwel.pdf
    • https://cdn.shopify.com/s/files/1/0429/6930/1151/files/16316830863.pdf
    • https://cdn.shopify.com/s/files/1/0434/8903/4402/files/blackbird_beatles_guitar_sheet_music.pdf
    • https://cdn.shopify.com/s/files/1/0436/9481/7445/files/lenifekufedak.pdf
    • https://cdn.shopify.com/s/files/1/0429/1097/4111/files/9028374383.pdf
    • https://cdn.shopify.com/s/files/1/0435/1839/4523/files/signing_naturally_7_12.pdf
    • https://cdn.shopify.com/s/files/1/0434/5308/7911/files/xolexemumet.pdf
    • https://cdn.shopify.com/s/files/1/0436/3298/4222/files/cisco_firepower_2140_ngfw_datasheet.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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006cff.bin
15eedf8fa0a0d04c4427dbff6dcdca34a31fe4c738fd85e033f3131cee402fa8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6CFF 5428 bytes
font_01_sfnt_off00007f40.bin
7fdf0e1361f303969f8106a4d946d689a49c5be04292793f87d2b6632c29dec5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7F40 4440 bytes
font_02_sfnt_off00008b29.bin
ee3a5b9d47fad58ea643923e3b87caca1775b234bd36dd85638c828ea8bf6371		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8B29 10172 bytes
font_03_sfnt_off0000ae38.bin
1df41416ece054d3cca32f135e48dc95f4d9c8a2bff4ba4edba1d14e21aabef6		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAE38 18776 bytes
font_04_sfnt_off0000cb9f.bin
cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCB9F 4324 bytes

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