Malicious PDF — malware analysis report

Static analysis result for SHA-256 8470fc76ec983f27…

MALICIOUS

PDF

40.1 KB Created: 2020-08-05 17:44:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8f833f430210ecbdffb6c9948dbf8787 SHA-1: 4f1107e7fdd9c1159cfd825d0c68a0a92af5308e SHA-256: 8470fc76ec983f27837bc053be4d0aecd41c9a03edd371602261c8307f777817
120 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to a link farm hosted on Shopify. One of these links, presented as 'lecture notes oncology 3rd edition pdf', redirects to a known malicious URL. This indicates a phishing or redirection attack designed to lead the user to harmful content. No scripts were extracted, but the PDF structure and embedded links strongly suggest a malicious intent.

Heuristics 3

  • 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.
  • 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.cc/wb?keyword=lecture%20notes%20oncology%203rd%20edition%20pdf
    • http://surumipe.andersonoverheaddoors.com/uploads/1/3/0/7/130775840/nemad_mixomozele_bimipixegomipis.pdf
    • http://files.rebekahsilver.com/uploads/1/3/2/6/132682892/c7145d8f.pdf
    • http://files.usafire.com/uploads/1/3/1/1/131163601/xepimufapodor_juxumajegazixub.pdf
    • https://cdn.shopify.com/s/files/1/0433/6861/1998/files/wobuba.pdf
    • https://cdn.shopify.com/s/files/1/0435/9569/4239/files/project_nevada_ttw.pdf
    • https://cdn.shopify.com/s/files/1/0437/2194/9335/files/python_check_if_dictionary_has_key.pdf
    • https://cdn.shopify.com/s/files/1/0433/0517/3147/files/black_armory_curated_rolls.pdf
    • https://cdn.shopify.com/s/files/1/0430/6590/1210/files/58084399928.pdf
    • https://cdn.shopify.com/s/files/1/0430/1773/2249/files/november_2020_calendar_free.pdf
    • https://cdn.shopify.com/s/files/1/0434/2402/2680/files/bible_dictionary_in_telugu.pdf
    • https://cdn.shopify.com/s/files/1/0440/8072/6168/files/almanca_renme_seti.pdf
    • https://cdn.shopify.com/s/files/1/0437/2417/7557/files/52173523825.pdf
    • https://cdn.shopify.com/s/files/1/0430/2100/9053/files/lerodu.pdf
    • https://cdn.shopify.com/s/files/1/0432/1309/5067/files/juzuxugesirebefumekulu.pdf
    • https://cdn.shopify.com/s/files/1/0428/3095/4655/files/mopedemimizubuxafogal.pdf
    • https://cdn.shopify.com/s/files/1/0432/6647/4139/files/93246502705.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_off00005de9.bin
532560e04fd8c110d1c97e2bc29480190bf836a824878716d26a82ea1ea7750f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5DE9 5320 bytes
font_01_sfnt_off00007021.bin
d7840571fca4b0f11fcb8863fce288d579f7b331bf28b779df1f6ffc87b26f62		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7021 10620 bytes

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