Malicious PDF — malware analysis report

Static analysis result for SHA-256 1e96601270c1cc01…

MALICIOUS

PDF

33.5 KB Created: 2020-08-19 02:27:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d3b6375ca3c39fc36b1c79cae616d8f8 SHA-1: aef0ddf4efa7a552f807e664eb2d0ab1528f543e SHA-256: 1e96601270c1cc01cf5dc355262433a6ac3bc0a9abaf763a1a08ed8ac1293d70
152 Risk Score

Malware Insights

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

The PDF was flagged by multiple critical heuristics indicating malicious redirector links and a link farm. The embedded URLs, particularly the one pointing to 'ttraff.ru', are associated with malicious redirector infrastructure. The document body contains garbled text but includes the same suspicious URL, suggesting it's part of a lure. The primary attack pattern involves directing users to potentially harmful external sites.

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=travego+bus+simulator+game+2018
    • http://files.felixstoweprimaryschools.com/uploads/1/3/1/4/131438018/2096682.pdf
    • http://files.stalbanthemartyrhull.com/uploads/1/3/2/6/132683142/lonopur.pdf
    • https://cdn.shopify.com/s/files/1/0432/0319/9138/files/51885882163.pdf
    • https://cdn.shopify.com/s/files/1/0432/2649/7182/files/24873479815.pdf
    • https://cdn.shopify.com/s/files/1/0433/4528/1183/files/vubuluguvugerimofeki.pdf
    • https://cdn.shopify.com/s/files/1/0428/5346/6271/files/59610197672.pdf
    • https://cdn.shopify.com/s/files/1/0447/9824/7078/files/cbse_date_sheet_2020-_21_class_10.pdf
    • https://cdn.shopify.com/s/files/1/0437/0219/0235/files/automata_theory_tutorials_point.pdf
    • https://cdn.shopify.com/s/files/1/0433/2313/0009/files/26540091055.pdf
    • https://cdn.shopify.com/s/files/1/0429/9613/8137/files/boket.pdf
    • https://cdn.shopify.com/s/files/1/0431/8006/4936/files/rijiwojomolusidimemojuzi.pdf
    • https://cdn.shopify.com/s/files/1/0438/2952/6688/files/32391452084.pdf
    • https://cdn.shopify.com/s/files/1/0431/8520/9512/files/suworogetoxe.pdf
    • https://cdn.shopify.com/s/files/1/0432/0083/9842/files/problemas_psicosociales_en_adolescentes.pdf
    • https://cdn.shopify.com/s/files/1/0431/9415/5170/files/whirlpool_cabrio_dryer_manual.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_off000043eb.bin
184191da055c393934285072edcfd8303079d10027a2599456c9c18c2f2acb83
pdf-font-stream PDF embedded font (sfnt) at offset 0x43EB 5676 bytes
font_01_sfnt_off0000572d.bin
5def0e0b5bd2762b58fff91a4a2f6f15039285bf70892b14e9f4d34087d2ad49
pdf-font-stream PDF embedded font (sfnt) at offset 0x572D 9932 bytes