Malicious PDF — malware analysis report

Static analysis result for SHA-256 b8fac4d70d5aa58b…

MALICIOUS

PDF

60.0 KB Created: 2020-08-15 04:17:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1ddce50a70fc86327bc85781b334f5e2 SHA-1: 960903a5f52e8d74a2523b8761bade0b62f61e09 SHA-256: b8fac4d70d5aa58b2193d6439c8d443a7eec12a1672e1233e84c5ca9fc431019
152 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, which is also present in the document body. The ML classifier strongly flagged this PDF as malicious. The document appears to be a lure, using a movie title to entice clicks on a link that leads to the redirector 'https://ttraff.cc/pify?keyword=agent+vinod+full+movie++720p+worldfree4u'. This redirector likely leads to further malicious content or downloads.

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.cc/pify?keyword=agent+vinod+full+movie++720p+worldfree4u
    • http://files.yourdfwattorney.com/uploads/1/3/0/7/130776206/menilukeriperipu.pdf
    • http://fofasi.smilesensations.ca/uploads/1/3/0/8/130873851/pidebemunenoba.pdf
    • https://cdn.shopify.com/s/files/1/0430/8015/5290/files/mebugumumopope.pdf
    • https://cdn.shopify.com/s/files/1/0450/5380/4694/files/dhanvantari_ayurveda_books_in_telugu.pdf
    • https://cdn.shopify.com/s/files/1/0431/5742/2240/files/15137227541.pdf
    • https://cdn.shopify.com/s/files/1/0432/7315/8806/files/18500625082.pdf
    • https://cdn.shopify.com/s/files/1/0433/9105/8070/files/55563756152.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/44411244229.pdf
    • https://cdn.shopify.com/s/files/1/0431/4526/5312/files/72853217018.pdf
    • https://cdn.shopify.com/s/files/1/0429/5763/5735/files/67977815186.pdf
    • https://cdn.shopify.com/s/files/1/0436/3167/3502/files/zurekaf.pdf
    • https://cdn.shopify.com/s/files/1/0435/6790/6975/files/foxuwupibokubi.pdf
    • https://cdn.shopify.com/s/files/1/0430/3713/0914/files/kowar.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00008854.bin
1cfa7d6eb966db5b0d05a136d70fc362e54b0141440bcb6507fe015c3271b1b0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8854 5440 bytes
font_01_sfnt_off00009ae3.bin
065f2e8eb5be3b0cf1985deb1fc9f91fc670213b4a1f16104db88e8b1fe71d8b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9AE3 10832 bytes
font_02_sfnt_off0000bf6e.bin
ead7fd593d7f5feef6f283420e9b55f8fa4552f107c64b0063d474dd3355abd8		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBF6E 16164 bytes
font_03_sfnt_off0000d487.bin
d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD487 4324 bytes

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