Malicious PDF — malware analysis report

Static analysis result for SHA-256 5e41e1a1809dcb39…

MALICIOUS

PDF

56.8 KB Created: 2020-08-24 13:05:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3733354ee9ebac0caeb82a3f9917ac04 SHA-1: ce5ec5c1462d40106357bcc29f38349e6306fffa SHA-256: 5e41e1a1809dcb395e76463487586649dcd972bf920d796996d68470e4532174
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link to a known malicious redirector, disguised with keywords related to movie downloads. This indicates a phishing or scam attempt to direct users to malicious content. The ML classifier also strongly flagged this PDF as malicious.

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.ru/pify?keyword=2016+hollywood+movies+tamil+dubbed
    • http://files.yellowdoorbandb.com/uploads/1/3/0/8/130813095/3829290.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0432/4383/1464/files/68754991927.pdf
    • https://cdn.shopify.com/s/files/1/0431/5293/3020/files/90617426889.pdf
    • https://cdn.shopify.com/s/files/1/0461/4176/7833/files/akame_ga_kill_manga_espaol.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/lofolevunukexus.pdf
    • https://cdn.shopify.com/s/files/1/0434/2346/5623/files/36052361322.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/66916333827.pdf
    • https://cdn.shopify.com/s/files/1/0432/3675/3570/files/makalah_amandemen_uud_1945.pdf
    • https://cdn.shopify.com/s/files/1/0431/0165/1101/files/lapovimuwa.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/zonamanasalusowalu.pdf
    • https://cdn.shopify.com/s/files/1/0435/6849/6798/files/probability_worksheet_gcse.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/2033782386.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/
    • http://scripts.sil.org/OFL
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00008972.bin
303917c12b551d7409a86513b4c6de63ef590ccf600d69a78f5d5949c085875f
pdf-font-stream PDF embedded font (sfnt) at offset 0x8972 5748 bytes
font_01_sfnt_off00009cf7.bin
9ec9f13c2001416ef659473d6accc941349b9589938e8d2376bbde6bf61ca895
pdf-font-stream PDF embedded font (sfnt) at offset 0x9CF7 10420 bytes
font_02_sfnt_off0000c0df.bin
3d726eeb5bbfdd758ba1874e16fc6481833f54059674315823f2d86b7abfbb27
pdf-font-stream PDF embedded font (sfnt) at offset 0xC0DF 16112 bytes