Malicious PDF — malware analysis report

Static analysis result for SHA-256 527e4702ab4ca1ae…

MALICIOUS

PDF

39.8 KB Created: 2020-08-09 06:55:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e92d938c96dda9d719ed1413660cdee8 SHA-1: ae71b57b090cc087d391242a54942c17e5b36760 SHA-256: 527e4702ab4ca1ae785f2cc0e2679cc1d9b0798da1ede5580d41c6f37b51ea5d
130 Risk Score

Malware Insights

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

The PDF contains a high number of embedded links, many pointing to external resources, which is indicative of a link farm or redirection strategy. One critical heuristic identified a link to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains a URL that is also present in the heuristics, suggesting a deliberate attempt to lead the user to malicious content. The presence of a 'download button' lure further supports a malicious intent.

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.ru/pify?keyword=catholic+prayers+in+spanish+pdf
    • http://mowura.celerahhewes.com/uploads/1/3/1/1/131163590/5235736.pdf
    • http://files.maaloufashford.com/uploads/1/3/1/4/131438427/3313529.pdf
    • http://files.jefferykylehutchins.com/uploads/1/3/2/6/132681517/wexojobem.pdf
    • https://cdn.shopify.com/s/files/1/0436/1335/6189/files/fedex_shipment_release_authorization_form.pdf
    • https://cdn.shopify.com/s/files/1/0431/1931/3062/files/terasuzonarajig.pdf
    • https://cdn.shopify.com/s/files/1/0437/1175/8504/files/pioneer_sx-_6000.pdf
    • https://cdn.shopify.com/s/files/1/0434/5534/8888/files/sabolurimov.pdf
    • https://cdn.shopify.com/s/files/1/0439/5565/0718/files/14485327907.pdf
    • https://cdn.shopify.com/s/files/1/0433/9728/3996/files/bca_1st_year_books_2020.pdf
    • https://cdn.shopify.com/s/files/1/0436/6984/8217/files/an_inspector_calls_notes.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/48695811849.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/dovaxetudomorunuk.pdf
    • https://cdn.shopify.com/s/files/1/0435/4077/5064/files/53759570152.pdf
    • https://cdn.shopify.com/s/files/1/0439/6145/0654/files/bear_awareness_ajahn_brahm.pdf
    • https://cdn.shopify.com/s/files/1/0432/2643/1652/files/5th_grade_math_exam.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_off00005c8d.bin
8cca3a6c73c784ccde6605f23e04f9d22e0c70d01da30d37f7c3191e8285c4a6
pdf-font-stream PDF embedded font (sfnt) at offset 0x5C8D 5248 bytes
font_01_sfnt_off00006e66.bin
f6e79ac5053aeea66970b1231ba63b04eef017f75459e2d01e6ef6b86d2162fe
pdf-font-stream PDF embedded font (sfnt) at offset 0x6E66 10632 bytes