Malicious PDF — malware analysis report

Static analysis result for SHA-256 be1ae3a6edfbc141…

MALICIOUS

PDF

45.6 KB Created: 2020-08-27 14:05:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c6d6722f90164b92995e839eed4beed8 SHA-1: 4cddae83ad7fbaff60067545aa051b61397a5a57 SHA-256: be1ae3a6edfbc141d26afdf95622b3d7c3d3fa8286c263c3f184b11cc3ee260c
152 Risk Score

Malware Insights

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

The PDF contains a link that redirects to a malicious site, identified by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body, though heavily obfuscated, contains the URL 'https://ttraff.club/pify?keyword=tamil+movie++2018+kuttymovies', suggesting a lure for users interested in movie downloads. The PDF also hosts a link farm, as indicated by the PDF_SEO_LINK_FARM heuristic, pointing to various PDF files, some of which are hosted on cdn.shopify.com.

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/pify?keyword=tamil+movie++2018+kuttymovies
    • http://rimawoxat.flosamuels.com/uploads/1/3/1/6/131637136/c320e4c529f.pdf
    • https://cdn.shopify.com/s/files/1/0437/3122/2682/files/nulofilenenasilinemebuvo.pdf
    • https://cdn.shopify.com/s/files/1/0429/8211/3433/files/36827870543.pdf
    • https://cdn.shopify.com/s/files/1/0434/8697/0021/files/sozisazuguvekawufevi.pdf
    • https://cdn.shopify.com/s/files/1/0464/9143/5176/files/dragon_age_inquisition_latest_patch.pdf
    • https://cdn.shopify.com/s/files/1/0431/1446/3394/files/frfi_arcforma_frizura.pdf
    • https://cdn.shopify.com/s/files/1/0434/0213/3671/files/fijobafulapebozisuduzi.pdf
    • https://cdn.shopify.com/s/files/1/0434/5489/0149/files/8927953603.pdf
    • https://cdn.shopify.com/s/files/1/0449/5890/8584/files/toutes_les_analyses_mdicales.pdf
    • https://cdn.shopify.com/s/files/1/0431/5794/6522/files/kojudo.pdf
    • https://cdn.shopify.com/s/files/1/0436/1538/7811/files/funciones_de_los_canales_de_distribucion.pdf
    • https://cdn.shopify.com/s/files/1/0437/2067/1384/files/swot_analysis_case_study.pdf
    • https://cdn.shopify.com/s/files/1/0430/8808/5143/files/windows_7_ultimate_activation_toolkit_free.pdf
    • https://cdn.shopify.com/s/files/1/0433/3862/9270/files/wativuxedebarifologes.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_off000073f5.bin
d3d7e93a6110334fddad04d0b7a3993401e619f8b02912a28fb9d16e75d47eb0
pdf-font-stream PDF embedded font (sfnt) at offset 0x73F5 5428 bytes
font_01_sfnt_off00008673.bin
a970e3b94be44a5873eb785b2b244edf26728d1d137f01d013bc329d3b6990b2
pdf-font-stream PDF embedded font (sfnt) at offset 0x8673 10456 bytes