Malicious PDF — malware analysis report

Static analysis result for SHA-256 17b20ca4a951dd20…

MALICIOUS

PDF

58.8 KB Created: 2020-08-23 00:22:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d21906f6295a21365088f3fb0eac3219 SHA-1: 8cf727a80eb3b5a4e315d30f0665796c0a9995f9 SHA-256: 17b20ca4a951dd209a40d4940b7d24aeacf92692d14914360ad60172ec60d4b8
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document contains numerous links, including one pointing to a known malicious redirector at 'https://ttraff.com/pify?keyword=adverse+drug+reaction+ppt+pdf'. The document's content and structure suggest it is part of a link farm designed to distribute malicious content. The ML classifier also strongly indicated maliciousness.

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=adverse+drug+reaction+ppt+pdf
    • http://files.valleyrootsfoodhub.com/uploads/1/3/0/7/130740344/fa8b50ce.pdf
    • http://files.sukiscaninerescuecrew.com/uploads/1/3/1/4/131452735/be1a0a2b76a74.pdf
    • http://www.opentle.org
    • http://fontawesome.iohttp://fontawesome.io/license/
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0437/3777/6289/files/20005912841.pdf
    • https://cdn.shopify.com/s/files/1/0436/0355/8564/files/bahubali_audio_song.pdf
    • https://cdn.shopify.com/s/files/1/0432/0090/5380/files/zipibexi.pdf
    • https://cdn.shopify.com/s/files/1/0436/7400/9753/files/57502550340.pdf
    • https://cdn.shopify.com/s/files/1/0431/6338/6016/files/fadusizedit.pdf
    • https://cdn.shopify.com/s/files/1/0431/9825/1170/files/media_player_classic_codec_pack_apk.pdf
    • https://cdn.shopify.com/s/files/1/0430/6193/6282/files/94902333313.pdf
    • https://cdn.shopify.com/s/files/1/0431/1410/2941/files/61255481048.pdf
    • https://cdn.shopify.com/s/files/1/0429/8915/8554/files/48843336162.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/
    • http://www.gnu.org/licenses/gpl.html
    • http://scripts.sil.org/OFL

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_005_off00008bc8.bin
3ff6429fa27f26558a1f7fe4484c77439dbbf6be962b22757a114602dbe492d7		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x8BC8 13048 bytes
font_00_sfnt_off0000712e.bin
4d3fb6748bdbfc0676bbc246a341b567ec3707c335db72ae26270b639488ab50		 pdf-font-stream PDF embedded font (sfnt) at offset 0x712E 1684 bytes
font_01_sfnt_off00007992.bin
d38abc36736e54e8f571f6afdb349e4485107051713427928e34dbee7f7877e9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7992 5340 bytes
font_03_sfnt_off0000b0e4.bin
153bb7e21f57cce854a729d22001c03853176f4b0297c97bf6a398e427c60773		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB0E4 14308 bytes

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