Malicious PDF — malware analysis report

Static analysis result for SHA-256 6778f4c04180f772…

MALICIOUS

PDF

117.1 KB Created: 2020-09-01 22:15:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d5d88e6298969eff3b1312b9724058c7 SHA-1: 8360103fc58032a6325c84ed91383c71bd164464 SHA-256: 6778f4c04180f77221cc4dd0c2a8ccbea096f3a373c10d6f93279853276d69be
154 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.ru, which is disguised as a search result for medical guidelines. This indicates a phishing or scam attempt. The ML classifier strongly flagged this PDF as malicious, and the presence of embedded URLs further supports this assessment. No scripts were extracted, but the primary attack vector appears to be social engineering via a malicious link.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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/wix?keyword=american+thyroid+association+guidelines+thyroid+nodule+2015
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/1616/7319/files/articulacion_alveolo_dental.pdf
    • https://cdn.shopify.com/s/files/1/0431/5915/8940/files/battlestar_galactica_pilot_watch_online_free.pdf
    • https://cdn.shopify.com/s/files/1/0431/5955/2155/files/895492321.pdf
    • https://cdn.shopify.com/s/files/1/0435/0889/1807/files/80300498060.pdf
    • https://cdn.shopify.com/s/files/1/0432/0159/3502/files/spotify_premium_windows_7.pdf
    • https://cdn.shopify.com/s/files/1/0431/0364/9954/files/divuwepazixosuzub.pdf
    • https://cdn.shopify.com/s/files/1/0459/6387/0368/files/korbel_brut_rose_tech_sheet.pdf
    • https://cdn.shopify.com/s/files/1/0430/0485/4426/files/6379923405.pdf
    • https://cdn.shopify.com/s/files/1/0432/8616/7702/files/adirondack_chair_plans_free.pdf
    • https://cdn.shopify.com/s/files/1/0431/6472/9512/files/xeloketoxojerikepuz.pdf
    • https://cdn.shopify.com/s/files/1/0431/3566/4284/files/korean_grammar_rules.pdf
    • https://cdn.shopify.com/s/files/1/0427/9166/5830/files/xowukojez.pdf
    • https://cdn.shopify.com/s/files/1/0432/9242/6405/files/89079337334.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_off00015141.bin
07b25251dec21c3492f306c21f6979520d6a47cedab9e2e1626e6cca5938f95b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x15141 11816 bytes
font_01_sfnt_off0001780b.bin
d158d0da60ad7b4fa765ceddaa70cd9057e2a86b990adbf9ee6a0cb8f15d0563		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1780B 5896 bytes
font_02_sfnt_off00018c00.bin
8dceeb85fa69d8913b6166b94285315eecdd0bb40e4f256c18590f7c8852a69d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x18C00 10872 bytes
font_03_sfnt_off0001b121.bin
99ddc6f5858eb134f8024171ebe717cbd02485c31471b921a5021903b5272953		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1B121 16060 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.