Malicious PDF — malware analysis report

Static analysis result for SHA-256 e6daa7034c015d9f…

MALICIOUS

PDF

37.9 KB Created: 2020-08-31 14:22:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ed42744827633acc3ad7b6d8f190eed0 SHA-1: f68cb9fd4b71ccb99690b1fb46f645b6b30fdf72 SHA-256: e6daa7034c015d9facfdeaa24ef3fc0ce9505306b4a710abc6640e2699ffd2a7
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains a significant number of embedded links, with a critical heuristic firing indicating it's a malicious redirector link farm. The primary malicious URL identified is 'https://ttraff.ru/pify?keyword=apple+developer+icon+guidelines', which is likely used to obscure the final destination of the attack. The document body itself appears to be obfuscated or corrupted, but the presence of numerous links and the specific heuristic firings strongly suggest 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.ru/pify?keyword=apple+developer+icon+guidelines
    • https://cdn.shopify.com/s/files/1/0434/9214/7366/files/pdf_to_editable_word_converter_online_without_email.pdf
    • https://cdn.shopify.com/s/files/1/0428/8171/2287/files/acknowledgment_form_for_training.pdf
    • https://cdn.shopify.com/s/files/1/0434/8415/1974/files/office_assistant_job_resume_format.pdf
    • https://cdn.shopify.com/s/files/1/0450/3499/5870/files/58690075948.pdf
    • https://cdn.shopify.com/s/files/1/0432/6057/5894/files/modefe.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/mowelikuzamutaj.pdf
    • https://cdn.shopify.com/s/files/1/0470/9797/0838/files/89192512397.pdf
    • https://cdn.shopify.com/s/files/1/0437/6995/4456/files/freckle_juice_whole_book.pdf
    • https://cdn.shopify.com/s/files/1/0428/9773/5843/files/18559789872.pdf
    • https://cdn.shopify.com/s/files/1/0431/8068/7524/files/sokelaludukodoriruv.pdf
    • https://static.usrfiles.com/ugd/585b1d_b8eed22e272742b8beb4553c6d7731cd.pdf
    • https://static.usrfiles.com/ugd/1be480_a8d9842c95e4410fa28d3706fe83d271.pdf
    • https://static.usrfiles.com/ugd/913720_13e16461e00940adb8e153c1c93875fc.pdf
    • https://static.usrfiles.com/ugd/b8c837_623562211cd74c198580d61541629065.pdf
    • https://static.usrfiles.com/ugd/b8c837_d2709baaf22c43938472f80dc81ba666.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_off0000570d.bin
c050a9334c40ced118adee60595166a7a32c14a945b46dd212246b93c162cf10
pdf-font-stream PDF embedded font (sfnt) at offset 0x570D 5080 bytes
font_01_sfnt_off00006874.bin
1ed113a9810f72ac73338a1daf6f70372a5fd44cd9d0a9540a476f639c6129a8
pdf-font-stream PDF embedded font (sfnt) at offset 0x6874 10052 bytes