Malicious PDF — malware analysis report

Static analysis result for SHA-256 696533391f0282db…

MALICIOUS

PDF

67.3 KB Created: 2020-08-07 03:48:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 118c1e7914541da9fcbfc5eea3ad206e SHA-1: dc209a6b9e6da81531f099a32f75bd16aba60fe7 SHA-256: 696533391f0282db490e5171c00f22e762b702d4708f69826ce34530ef199ecd
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 external PDF files, suggesting a link farm or SEO manipulation tactic. One prominent URL, https://ttraff.ru/pify?keyword=peter+f+drucker+books+pdf, is flagged as a malicious redirector, indicating an attempt to lure users to malicious content. The ML classifier strongly supports the malicious nature of this PDF.

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=peter+f+drucker+books+pdf
    • http://files.busterscinematicuniverse.com/uploads/1/3/1/1/131163643/1366920.pdf
    • http://files.vistafairbanks.org/uploads/1/3/0/7/130739918/sorefobisusozal_jogodikifofuzev_xugisosobuni.pdf
    • http://poxovuwu.laurietsutakawa.com/uploads/1/3/1/0/131069934/jetobejekadi_tababuve_dezevawor_nuguwagikugin.pdf
    • http://files.stpetetowtrucks.com/uploads/1/3/0/7/130776864/sodelewopumi_gisiwezaxenog.pdf
    • http://files.etgmin.org/uploads/1/3/0/9/130969683/3608976.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0433/5602/9093/files/34092940212.pdf
    • https://cdn.shopify.com/s/files/1/0434/2641/4749/files/dugufepogazevovosakiwode.pdf
    • https://cdn.shopify.com/s/files/1/0432/3747/4472/files/fugiwivodarololo.pdf
    • https://cdn.shopify.com/s/files/1/0430/3470/6069/files/american_hunter_feeder_user_s_manual.pdf
    • https://cdn.shopify.com/s/files/1/0440/0922/6398/files/php_foreach_array.pdf
    • https://cdn.shopify.com/s/files/1/0454/6166/7998/files/bosch_gsh_11e_spare_parts_list.pdf
    • https://cdn.shopify.com/s/files/1/0438/0252/5856/files/kedawa.pdf
    • https://cdn.shopify.com/s/files/1/0430/7314/2935/files/wugerumatojoxiza.pdf
    • https://cdn.shopify.com/s/files/1/0431/7547/7416/files/ruginan.pdf
    • https://cdn.shopify.com/s/files/1/0428/3983/4780/files/free_medical_books_download_in_format.pdf
    • https://cdn.shopify.com/s/files/1/0428/9147/7159/files/download_adobe_acrobat_reader_offline_installer_latest_version.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b071.bin
11a54cef2a0df7b43f20ba3598adfea106dde79515fa9b00051279c4ee46a486		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB071 4840 bytes
font_01_sfnt_off0000c0ee.bin
e3f8543183922ebd6c395c5cf5878b6e38ac8379b5a2bc1595083f232396c2e4		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC0EE 16036 bytes
font_02_sfnt_off0000f24d.bin
0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF24D 4324 bytes

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