Malicious PDF — malware analysis report

Static analysis result for SHA-256 63a04d3119b57968…

MALICIOUS

PDF

37.4 KB Created: 2020-08-15 01:08:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: befc2661fa1b69fdaf146319fe00700f SHA-1: 5111ab4d48d9767f3b41b0460b5ac4c2863c0521 SHA-256: 63a04d3119b57968623689031f3000032b9b691ef9f9c9cc8c42ffe31f697aa4
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a heuristic firing for linking to known malicious redirector infrastructure, specifically 'ttraff.ru'. The document body, though heavily obfuscated, contains this URL and numerous other links to PDF files hosted on Shopify and other domains, suggesting a link farm or SEO poisoning attempt. The primary malicious URL is https://ttraff.ru/pify?keyword=weather+report+north+carolina+usa, which is likely intended to redirect the user to a malicious site.

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=weather+report+north+carolina+usa
    • http://jebexov.losangelesmakeupartist.org/uploads/1/3/1/4/131452845/146b91d0.pdf
    • http://lodib.jorellmelendezbadillo.com/uploads/1/3/1/4/131406082/5201783.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0432/5448/1058/files/que_es_el_ateismo.pdf
    • https://cdn.shopify.com/s/files/1/0429/7634/6266/files/57949292922.pdf
    • https://cdn.shopify.com/s/files/1/0432/4976/2459/files/supup.pdf
    • https://cdn.shopify.com/s/files/1/0436/7994/0761/files/86648979024.pdf
    • https://cdn.shopify.com/s/files/1/0435/5905/9615/files/hand_clap_sheet_music.pdf
    • https://cdn.shopify.com/s/files/1/0435/7462/4419/files/tinkers_construct_lightweight.pdf
    • https://cdn.shopify.com/s/files/1/0433/3813/7755/files/volorikuboveg.pdf
    • https://cdn.shopify.com/s/files/1/0433/7418/2563/files/business_environment_notes.pdf
    • https://cdn.shopify.com/s/files/1/0429/6274/7545/files/68772921752.pdf
    • https://cdn.shopify.com/s/files/1/0431/6299/2801/files/95349668686.pdf
    • https://cdn.shopify.com/s/files/1/0438/7799/0568/files/89068387357.pdf
    • https://cdn.shopify.com/s/files/1/0432/4671/5040/files/29756890765.pdf
    • https://cdn.shopify.com/s/files/1/0430/1019/5605/files/fagajefapexu.pdf
    • https://cdn.shopify.com/s/files/1/0432/9088/6312/files/information_security_news_site.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_off000054f6.bin
0b4161421d85c2cb3a57b666caf3d7eed7bda2d3a445f473c5a17dc8858adb8d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x54F6 5032 bytes
font_01_sfnt_off0000661a.bin
5f7c4e761bb82082fe2fdb6054fb9b8e7f4dd2a9df55b5a657c54492d1fe3b19		 pdf-font-stream PDF embedded font (sfnt) at offset 0x661A 10200 bytes

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