Malicious PDF — malware analysis report

Static analysis result for SHA-256 ff9f09d54e0beca4…

MALICIOUS

PDF

36.7 KB Created: 2020-08-31 11:41:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 284ff268e303d65bae538f1d56cf5f41 SHA-1: 79d1cca858e8194ac6bef9ec94d037697fc439b4 SHA-256: ff9f09d54e0beca46fc27152355ef2de87f5fe19edf8017a6abe5789b89693c7
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF document was flagged as malicious by a machine learning classifier and contains a critical heuristic firing for a malicious redirector link. The primary malicious URL identified is https://ttraff.com/wix?keyword=%25C3%25B6devmatik+2016+e%25C4%259Fitimhane. While the document body is heavily obfuscated, the presence of this link strongly suggests a phishing or redirection attempt.

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/wix?keyword=%25C3%25B6devmatik+2016+e%25C4%259Fitimhane
    • https://cdn.shopify.com/s/files/1/0431/6459/8434/files/anatomy_of_scapula.pdf
    • https://cdn.shopify.com/s/files/1/0433/1634/7035/files/multiplication_of_binomials_examples_with_answers.pdf
    • https://cdn.shopify.com/s/files/1/0468/9785/6674/files/85239521971.pdf
    • https://cdn.shopify.com/s/files/1/0432/6585/1542/files/56744873293.pdf
    • https://static.usrfiles.com/ugd/b8c837_17c8afdc22764fbf88dcff5128496d2a.pdf
    • https://static.usrfiles.com/ugd/271e65_efff2f02c5564b30b0b9da592aadef7d.pdf
    • https://static.usrfiles.com/ugd/05301a_f6f8cf208aba4fee9550861e206fd2f3.pdf
    • https://static.usrfiles.com/ugd/5fd5c1_15454b58f0d2439fa3a80fd43215d7c5.pdf
    • https://static.usrfiles.com/ugd/2074c9_ba2f6ddc64df478393839629371dc2c7.pdf
    • https://static.usrfiles.com/ugd/63d3ad_963ab21e723a4403b11c23a2802de78e.pdf
    • https://static.usrfiles.com/ugd/60933b_cc0407462a874c04924e29332bbd9dd0.pdf
    • https://static.usrfiles.com/ugd/b8c837_0fe6ca848f8b444f8be2538d1539486f.pdf
    • https://cdn.shopify.com/s/files/1/0432/3731/0626/files/68176321525.pdf
    • https://cdn.shopify.com/s/files/1/0434/7700/8550/files/cyanogenmod_custom_rom_free.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/dedijadexurusefux.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/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004d58.bin
84d43bca31f7cb6541a868a3577b901cc95e5c592b9108e06be2669a034357a4
pdf-font-stream PDF embedded font (sfnt) at offset 0x4D58 5648 bytes
font_01_sfnt_off00006087.bin
306e629d8e98620ae32c1a30998ba90cefbeef3ec6a827667c40bd81cf954e5a
pdf-font-stream PDF embedded font (sfnt) at offset 0x6087 11444 bytes