Malicious PDF — malware analysis report

Static analysis result for SHA-256 6c09c1d665d10906…

MALICIOUS

PDF

66.8 KB Created: 2020-08-19 07:17:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 58c0709dc59eb42b0b735aaf2bd3fa1d SHA-1: 373a6db49381725124c5958de4d62185eb6e0859 SHA-256: 6c09c1d665d10906e0194d107ec5d23ab045e1f277c6e2563f07f886d8d41814
154 Risk Score

Malware Insights

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

This PDF file contains numerous embedded links, with one identified as a malicious redirector. The document body, though obfuscated, contains a URL that points to a known malicious redirector, suggesting an attempt to lead the user to harmful content. The presence of a large number of external links also indicates a potential SEO spam or link farm tactic.

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=yesterday+beatles+classical+guitar+pdf
    • http://files.peakcombustion.com/uploads/1/3/1/4/131453111/kujavona_pijepilojenadi_zejuj_vawosija.pdf
    • http://files.lorraineparishwriter.com/uploads/1/3/0/8/130873870/lobojixo.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0432/7945/0272/files/google_chrome_filehippo_full.pdf
    • https://cdn.shopify.com/s/files/1/0432/1456/9640/files/mititebufosowe.pdf
    • https://cdn.shopify.com/s/files/1/0430/0872/1045/files/rodada.pdf
    • https://cdn.shopify.com/s/files/1/0428/8148/2919/files/18886440240.pdf
    • https://cdn.shopify.com/s/files/1/0434/4751/7341/files/sakoluxuriwezajomisaraw.pdf
    • https://cdn.shopify.com/s/files/1/0433/4583/8239/files/73912794170.pdf
    • https://cdn.shopify.com/s/files/1/0439/4716/3806/files/dao_arcane_warrior_build.pdf
    • https://cdn.shopify.com/s/files/1/0430/8362/8697/files/taburipemexef.pdf
    • https://cdn.shopify.com/s/files/1/0436/2724/9826/files/wow_inscription_leveling_guide.pdf
    • https://cdn.shopify.com/s/files/1/0432/7089/7824/files/china_embassy_malaysia_visa_form.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://scripts.sil.org/OFL
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000a52e.bin
b466c4e0cede6168a5573c9035df214e8f8fd0b81a556e78b1844b4ab956c9f6		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA52E 5192 bytes
font_01_sfnt_off0000b6f4.bin
8eca0e90a2511804582f5722e30dfa3811a1f669b76bc0b5f33ccf5e1f9d1484		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB6F4 10304 bytes
font_02_sfnt_off0000da6d.bin
46d9b83afd797048ab251ddfc9ca9a6db44f3280724c231f6a80a061bcc6fc12		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDA6D 16120 bytes
font_03_sfnt_off0000ef56.bin
9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEF56 4324 bytes

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