Malicious PDF — malware analysis report

Static analysis result for SHA-256 5b0c5cf016523f0c…

MALICIOUS

PDF

44.8 KB Created: 2020-09-12 14:48:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5d332ac0160843f2ce744fb80005aef7 SHA-1: f6227b5b60b4a37d90f8c374d2c318727d8ca1a4 SHA-256: 5b0c5cf016523f0c475401272f4d8b7e2caf4963bbe87a99de46eee3deb2bda1
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.club, which is likely used to obscure the final destination and potentially engage in phishing or malware distribution. The document body, though heavily obfuscated, contains the same malicious URL and references to 'Amelia Earhart movie', suggesting a lure. The heuristic firings confirm the presence of malicious redirector links and a link farm, indicating a campaign to drive traffic to potentially harmful sites.

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.club/wix?keyword=amelia+earhart+movie
    • http://files.dnaleatherwa.com/uploads/1/3/0/7/130738814/8327209.pdf
    • http://topog.boostfitness.co.uk/uploads/1/3/1/4/131406798/xereladatutifuvixaf.pdf
    • http://miwunu.homecompanyservice.com/uploads/1/3/1/4/131406665/39751c.pdf
    • http://files.brian-amos.com/uploads/1/3/2/6/132695602/geferasivijitepux.pdf
    • http://files.right-resources.org.uk/uploads/1/3/1/0/131071127/kapuzemutubav.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/48bf55_4ee1b4b850954efea01d35278737a0cb.pdf
    • https://static.usrfiles.com/ugd/299074_2959d7e2867f4951860f87b33b1bde8d.pdf
    • https://static.usrfiles.com/ugd/d99ef3_5b4beae018884a8889ca6565647e04f8.pdf
    • https://static.usrfiles.com/ugd/269bb8_547885224f604444801a8ff7bcd52127.pdf
    • https://static.usrfiles.com/ugd/031dda_db1757ef7106424f908276077c96f87f.pdf
    • https://static.usrfiles.com/ugd/46a5ae_535cc0f64c80452ca0400b5e947e2f1e.pdf
    • https://static.usrfiles.com/ugd/4ca7f5_32493ce6dbd8444d8fb93b2da2e43b93.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_off000072c2.bin
70cbcffb5b6f4aa5cc3fb30481d8dd36f50c378d102eb98a6284375a36fd5570
pdf-font-stream PDF embedded font (sfnt) at offset 0x72C2 4796 bytes
font_01_sfnt_off000082e3.bin
cf9887464a556cc02c862c1742a105e633e56f1940ae0ab61d1b3054b3309d1d
pdf-font-stream PDF embedded font (sfnt) at offset 0x82E3 10388 bytes