Malicious PDF — malware analysis report

Static analysis result for SHA-256 686a015e28afe5bb…

MALICIOUS

PDF

39.0 KB Created: 2020-07-12 05:46:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9553cbdec13857875e4b3df8fa918602 SHA-1: 8b23500812bd6385cc21c8bd645259bd692da2a6 SHA-256: 686a015e28afe5bbd65597aa0a700f39278d565ab979ffe6f8ce7f093e554f2b
154 Risk Score

Malware Insights

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

The PDF contains a link to a redirector, ttraff.ru, which is flagged as malicious. This suggests the document is designed to lead users to harmful content, likely by disguising it as a free download. The presence of numerous other PDF links further supports the idea of a link farm or SEO manipulation to distribute malicious files. No scripts were extracted, but the embedded URLs and heuristic firings strongly indicate a malicious intent to redirect users.

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.ru/pify?keyword=london+street+map+pdf+free+download
    • http://files.reading2reading.com/uploads/1/3/0/9/130969555/49253ecafb.pdf
    • http://files.jjjohnsonauthor.com/uploads/1/3/1/4/131437268/lotoxaboxubuw.pdf
    • http://files.ajeplanners.com/uploads/1/3/1/4/131406816/sifojopese_nidukuzinagimo_xutokajofuzi_roxurugar.pdf
    • http://files.daysinnepal.com/uploads/1/3/2/8/132815385/2164140.pdf
    • http://files.familycounselingandcoaching.com/uploads/1/3/2/3/132302966/2566390.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://povunefuw.files.wordpress.com/2020/06/53314719779.pdf
    • https://ladubine.files.wordpress.com/2020/06/49182673446.pdf
    • https://jijafozivofi.files.wordpress.com/2020/06/ripafakepatatumuwixer.pdf
    • https://xabofufutin.files.wordpress.com/2020/06/49694228349.pdf
    • https://dunawudawoma.files.wordpress.com/2020/06/raletojoxedomudel.pdf
    • https://wezosufetela.files.wordpress.com/2020/07/rudamafugisuzes.pdf
    • https://tanutukezod.files.wordpress.com/2020/07/14030946638.pdf
    • https://cdn.shopify.com/s/files/1/0430/2897/1674/files/94684023887.pdf
    • https://cdn.shopify.com/s/files/1/0427/7148/0742/files/60825281319.pdf
    • https://cdn.shopify.com/s/files/1/0431/1800/2340/files/86287643547.pdf
    • https://cdn.shopify.com/s/files/1/0427/4916/5734/files/47983837682.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/94229011204.pdf
    • https://cdn.shopify.com/s/files/1/0428/1755/2543/files/43567852658.pdf
    • https://cdn.shopify.com/s/files/1/0427/7898/4614/files/89766314261.pdf
    • https://cdn.shopify.com/s/files/1/0432/1348/8292/files/bibidaxel.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005bb5.bin
a00bcd0724b3318221ced03d47d3be4c198cfe7eda23670033670285ab77f547		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5BB5 4960 bytes
font_01_sfnt_off00006c8c.bin
1cfde839857863cb455550f47b331b687977ad1c87be208130daafda9cc3252e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6C8C 10124 bytes

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