Malicious PDF — malware analysis report

Static analysis result for SHA-256 4ab557a394dd6939…

MALICIOUS

PDF

65.3 KB Created: 2020-08-09 20:10:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 91c56a0d1e5ad7e03f953090e8dfbfbc SHA-1: 713197b7a37553003af45e74d7f6010365d4826f SHA-256: 4ab557a394dd693989fc43b860a7585aaad7ad1c500e3f6b9930b178e4840127
120 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing for PDF_MALICIOUS_REDIRECTOR_LINK, indicating it points to malicious infrastructure. Additionally, PDF_SEO_LINK_FARM suggests a large number of outbound links, likely for SEO manipulation or to host further malicious content. The embedded URL 'https://ttraff.cc/pify?keyword=john+boyne+libros+pdf' is a primary indicator of malicious redirection. The document body, though heavily obfuscated, contains references to 'John boyne libros pdf' and 'wkhtmltopdf', suggesting a lure for free book downloads.

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/pify?keyword=john+boyne+libros+pdf
    • http://files.smokehousecanecorso.com/uploads/1/3/1/4/131406269/nogivi.pdf
    • http://files.swswa.org/uploads/1/3/1/4/131483184/950092.pdf
    • http://files.thesyncretistrealm.com/uploads/1/3/0/9/130969018/2d7d4a7e.pdf
    • http://rerepis.youarethesalt.org/uploads/1/3/2/6/132681670/pejelifofakin.pdf
    • http://files.mnnewfs.com/uploads/1/3/2/6/132681901/1719107.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/72593533024.pdf
    • https://cdn.shopify.com/s/files/1/0434/9375/2997/files/gupuxuledubofa.pdf
    • https://cdn.shopify.com/s/files/1/0432/9567/0427/files/47803460254.pdf
    • https://cdn.shopify.com/s/files/1/0430/3912/9751/files/budget_speech_2020_highlights.pdf
    • https://cdn.shopify.com/s/files/1/0432/2823/3887/files/bibemiroviwivurojowewoveb.pdf
    • https://cdn.shopify.com/s/files/1/0436/4645/1862/files/felomolexulu.pdf
    • https://cdn.shopify.com/s/files/1/0436/9671/7992/files/7580866820.pdf
    • https://cdn.shopify.com/s/files/1/0435/8373/3915/files/rujinilutixakudifo.pdf
    • https://cdn.shopify.com/s/files/1/0430/2811/9706/files/tuxewinubofoviseb.pdf
    • https://cdn.shopify.com/s/files/1/0430/6753/9623/files/13030008565.pdf
    • https://cdn.shopify.com/s/files/1/0436/4356/8278/files/vujowogerigomijuno.pdf
    • https://cdn.shopify.com/s/files/1/0434/1379/9066/files/annotated_outline_apa.pdf
    • https://cdn.shopify.com/s/files/1/0435/5109/6991/files/88522870476.pdf
    • https://cdn.shopify.com/s/files/1/0437/4121/6919/files/ancient_shadow_armor_terraria.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_off0000c355.bin
78d4f9b7bc8039dc19f4d4c53e985bec3e4b29b59910bf033206d32729f02022
pdf-font-stream PDF embedded font (sfnt) at offset 0xC355 5148 bytes
font_01_sfnt_off0000d4d2.bin
7762e2596fc7ec3bbcf6993d05518f82d92d35596719bf9f65e520df02fc33e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xD4D2 10332 bytes