Malicious PDF — malware analysis report

Static analysis result for SHA-256 70b6db837693a7e2…

MALICIOUS

PDF

53.8 KB Created: 2020-08-21 08:32:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e23c4e86045ea6de29ad32c238870b34 SHA-1: 6529b96bcfb6762cb7ed219588f05117d58007c1 SHA-256: 70b6db837693a7e2c57b24a8fc4004b1bc7d77f663554d913cda612c37a575ff
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to Shopify domains hosting other PDFs, suggesting a link farm or SEO manipulation tactic. One prominent URL, 'https://ttraff.ru/pify?keyword=aopc+dockets+sheets', is identified as a malicious redirector. The ML classifier strongly flagged this PDF as malicious, indicating a high likelihood of malicious intent.

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=aopc+dockets+sheets
    • http://files.dunphyshandguntraining.com/uploads/1/3/2/6/132681566/d354c601d.pdf
    • http://files.cubscoutpack78.org/uploads/1/3/0/8/130874064/mogitesusutopenejudo.pdf
    • http://rosanudi.briggsquarterhorses.com/uploads/1/3/0/7/130775111/351085.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0432/2436/7266/files/59574437893.pdf
    • https://cdn.shopify.com/s/files/1/0434/0505/0021/files/42570470553.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/xozujegemuzudileruzodedus.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/bobidaxida.pdf
    • https://cdn.shopify.com/s/files/1/0431/6633/5138/files/english_aptitude_tests.pdf
    • https://cdn.shopify.com/s/files/1/0441/1038/1208/files/basic_electrical_engineering_objective_questions_and_answers.pdf
    • https://cdn.shopify.com/s/files/1/0440/7263/2470/files/74_el_camino.pdf
    • https://cdn.shopify.com/s/files/1/0430/0839/3367/files/mp_board_online_marksheet_check.pdf
    • https://cdn.shopify.com/s/files/1/0438/2490/6400/files/94226950568.pdf
    • https://cdn.shopify.com/s/files/1/0432/0670/5311/files/belajar_bahasa_thailand_dan_tulisannya.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_off0000970c.bin
4ca429badbaab62a1a24e071446ab40bf9e28d0e7c2b15a369651318be7b0eb2
pdf-font-stream PDF embedded font (sfnt) at offset 0x970C 4876 bytes
font_01_sfnt_off0000a79d.bin
17440cbf6efc57b8644f05bb10739743df50dc682d58625552fad19808fd4adb
pdf-font-stream PDF embedded font (sfnt) at offset 0xA79D 10312 bytes