Malicious PDF — malware analysis report

Static analysis result for SHA-256 277ec92814df97ce…

MALICIOUS

PDF

44.6 KB Created: 2020-08-10 00:18:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: dbfbbeab4e7e3423ba67ec010f701453 SHA-1: 0a8b9557fac22f9a339081ef849b587644d64c16 SHA-256: 277ec92814df97ce4fdad7d6856c40e7fe43dcfbbcb028617549b55c1c1a285e
128 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.001 User Execution: Malicious Link T1059.001 PowerShell

The PDF file contains multiple embedded links, with one identified as a malicious redirector. The document body, though heavily obfuscated, contains the malicious URL. The presence of a 'download button' heuristic further supports the lure mechanism. The primary attack vector appears to be tricking the user into clicking a link that leads to a malicious site, likely for further exploitation or credential harvesting.

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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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/pify?keyword=ciclo+biologico+de+balantidium+coli+pdf
    • http://files.albuquerquerenovation.com/uploads/1/3/0/9/130969358/9919446.pdf
    • http://kukewaxi.xoxoperformance.org/uploads/1/3/0/9/130969742/mimobet.pdf
    • http://sagig.studiosquid.com.au/uploads/1/3/2/7/132712207/telidobekedabon-rubonutadeve-dupadiborafaxe.pdf
    • https://cdn.shopify.com/s/files/1/0438/5210/3845/files/50690303333.pdf
    • https://cdn.shopify.com/s/files/1/0429/2991/4012/files/382274336.pdf
    • https://cdn.shopify.com/s/files/1/0440/8147/9832/files/self_efficacy_theory_bandura_1977.pdf
    • https://cdn.shopify.com/s/files/1/0433/4203/7150/files/the_martian_full_book.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/telisupuf.pdf
    • https://cdn.shopify.com/s/files/1/0440/2728/1558/files/21057456349.pdf
    • https://cdn.shopify.com/s/files/1/0428/7230/7875/files/28446507591.pdf
    • https://cdn.shopify.com/s/files/1/0431/8353/8331/files/66488595279.pdf
    • https://cdn.shopify.com/s/files/1/0431/6345/1560/files/convertir_de_a_word_descargar_gratis.pdf
    • https://cdn.shopify.com/s/files/1/0433/4845/9675/files/86869834466.pdf
    • https://cdn.shopify.com/s/files/1/0431/6502/4412/files/aristotelico_tomista.pdf
    • https://cdn.shopify.com/s/files/1/0430/6717/9165/files/73743236222.pdf
    • https://cdn.shopify.com/s/files/1/0437/8787/8549/files/gerejax.pdf
    • https://cdn.shopify.com/s/files/1/0435/6535/1073/files/54758658100.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_off00007058.bin
5c3a4fb8b50b27aaf1512caa8220f7229316fc8fd3703ae7974730ecdeb2bba7
pdf-font-stream PDF embedded font (sfnt) at offset 0x7058 5248 bytes
font_01_sfnt_off00008222.bin
1edae3b0356f827b5e4dc7d8fdbf0f08d100676e9765524ee515e8df9401e3e9
pdf-font-stream PDF embedded font (sfnt) at offset 0x8222 10252 bytes