Malicious PDF — malware analysis report

Static analysis result for SHA-256 636e50e1606f2e5c…

MALICIOUS

PDF

40.0 KB Created: 2020-08-23 22:29:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7f71bf9d999fb437b7eec1a7ae9a5f2e SHA-1: 51e823305736338e900b433b9a5f57eab5c0a1ae SHA-256: 636e50e1606f2e5c5966b8c08d6a3d622d8016cd6e5816195b871e7fcc89f230
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous embedded URLs, with one identified as a malicious redirector. The document body, though heavily obfuscated, contains text that appears to be a lure for a 'personal introduction powerpoint template free'. The presence of a malicious redirector suggests an attempt to lead the user to a malicious site, likely for phishing or to download further malware. No scripts were extracted, but the PDF structure and embedded links are indicative of a malicious document.

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=personal+introduction+powerpoint+template+free
    • http://bizixis.rosamiliafornjea.org/uploads/1/3/0/8/130873715/9004533.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0447/9831/2609/files/microbiology_culture_media.pdf
    • https://cdn.shopify.com/s/files/1/0431/6990/6844/files/geriwanefagegumovuvu.pdf
    • https://cdn.shopify.com/s/files/1/0440/9117/9160/files/porobal.pdf
    • https://cdn.shopify.com/s/files/1/0433/3918/6344/files/calendario_2020_con_festivos.pdf
    • https://cdn.shopify.com/s/files/1/0434/3519/6566/files/twin_xlong_fitted_sheets.pdf
    • https://cdn.shopify.com/s/files/1/0434/3146/1016/files/knockout_js_bind_to_hidden_field.pdf
    • https://cdn.shopify.com/s/files/1/0428/0582/1599/files/jupofojuwamexasutodituw.pdf
    • https://cdn.shopify.com/s/files/1/0431/1131/7658/files/29866281125.pdf
    • https://cdn.shopify.com/s/files/1/0428/1312/8867/files/79689802931.pdf
    • https://cdn.shopify.com/s/files/1/0435/6187/7663/files/carian_cole_no_tomorrow.pdf
    • https://cdn.shopify.com/s/files/1/0432/1699/4466/files/rutelaveleladatusuxemalaj.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005e1f.bin
ea33d7eb205fa594a2411615a7cebeda8cd77dc4deeb04640a3b19986b19b303
pdf-font-stream PDF embedded font (sfnt) at offset 0x5E1F 5396 bytes
font_01_sfnt_off00007068.bin
2823bcccb5956547aed4cd0c2520c5fa09ff060c1a5db27fef1c3fac741734b7
pdf-font-stream PDF embedded font (sfnt) at offset 0x7068 10144 bytes