Malicious PDF — malware analysis report

Static analysis result for SHA-256 6413c93e6b220f1e…

MALICIOUS

PDF

40.4 KB Created: 2020-08-30 22:48:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: aef42fa50a1b64f7b847107e248b5f12 SHA-1: f0161c0a117b230f234f3f62e85cd3080b635bd2 SHA-256: 6413c93e6b220f1e2a07b9d447c4fe89ea6258025e174d35fd84fd72362a6e20
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link to a known malicious redirector, ttraff.ru, disguised as a document about human potential. This suggests a phishing or redirection attempt to a malicious site. The presence of numerous other PDF links, many pointing to benign content, indicates a potential link farm or SEO manipulation tactic to obscure the malicious URL. No scripts were extracted, and the document body is heavily obfuscated.

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/wix?keyword=the+hidden+power+in+humans+pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/f967ac_fdb439c03cbb42d6957073c15f9f97bd.pdf
    • https://static.usrfiles.com/ugd/b8c837_65061ddcc2a14518bc7b47bbc370ada7.pdf
    • https://static.usrfiles.com/ugd/b8c837_3e513476bfcc46d092b5bce988f05cef.pdf
    • https://cdn.shopify.com/s/files/1/0430/3742/5813/files/ielts_listening_online_practice_tests_with_answers.pdf
    • https://cdn.shopify.com/s/files/1/0438/5472/5270/files/59402912700.pdf
    • https://cdn.shopify.com/s/files/1/0429/0753/3475/files/36859921713.pdf
    • https://cdn.shopify.com/s/files/1/0427/5824/2470/files/design_and_analysis_of_algorithms_tutorialspoint.pdf
    • https://cdn.shopify.com/s/files/1/0437/8784/5790/files/muwufijumuvif.pdf
    • https://cdn.shopify.com/s/files/1/0436/8351/2473/files/vastu_shastra_in_kannada.pdf
    • https://static.usrfiles.com/ugd/b8c837_3743659eb6c8433fa757ec478e5318f0.pdf
    • https://static.usrfiles.com/ugd/b8c837_6cf68f4a1ded44988108a2d7c3baba7d.pdf
    • https://static.usrfiles.com/ugd/529dbf_7cc85f47fd194e8fb90559033d788940.pdf
    • https://static.usrfiles.com/ugd/9ec29b_7a392733f964481e9369ea80071357aa.pdf
    • https://static.usrfiles.com/ugd/45fd81_d0f2f8d6190546e187a112e344506789.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_off000060f0.bin
15be41086b261f219b3e2fecbc09298dbf3e5e62fb46340b833535bb26c6b666
pdf-font-stream PDF embedded font (sfnt) at offset 0x60F0 5288 bytes
font_01_sfnt_off000072c6.bin
9585ea4b5934e7a83ec8518da50b7ad40a309aa0ad05bf6ef63379726f5ee0d2
pdf-font-stream PDF embedded font (sfnt) at offset 0x72C6 9908 bytes