Malicious PDF — malware analysis report

Static analysis result for SHA-256 745acda0ede72897…

MALICIOUS

PDF

48.2 KB Created: 2020-08-25 17:23:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 838c26ba64d7937be14388ad7c7816b0 SHA-1: 0137c95621bfc7206dd3de120cb26a0940c16086 SHA-256: 745acda0ede72897c4b85a8e52516f005f734f7b251b81241d94132c93fd8479
154 Risk Score

Malware Insights

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

The PDF file contains embedded URLs, with one identified as a malicious redirector. The document body, though heavily obfuscated, includes text related to 'oral police interview questions and answers pdf', suggesting a lure to trick users into clicking the malicious link. The presence of numerous Shopify-hosted PDF links, some of which are benign, indicates a potential link farm or SEO manipulation tactic to disguise the malicious intent. No scripts were extracted from this sample.

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=oral+police+interview+questions+and+answers+pdf
    • http://rowap.celebrationonwells.com/uploads/1/3/1/6/131607163/tatisugofir.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0431/6656/4507/files/cambridge_english_empower_for_spanish_speakers_a2.pdf
    • https://cdn.shopify.com/s/files/1/0436/3619/5488/files/kuzifakuxijid.pdf
    • https://cdn.shopify.com/s/files/1/0450/1441/7572/files/bafekowatubopovodabajagin.pdf
    • https://cdn.shopify.com/s/files/1/0436/2852/7779/files/angular_4_dynamic_form_validation_on_submit.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/96951977507.pdf
    • https://cdn.shopify.com/s/files/1/0440/3780/0086/files/14456289869.pdf
    • https://cdn.shopify.com/s/files/1/0433/9954/4984/files/cours_d_anglais_niveau_bac.pdf
    • https://cdn.shopify.com/s/files/1/0433/9249/9868/files/40013700599.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_off000070fa.bin
0373e75363d8a2e205d55bb4e0310ee623b92830757a2ac7bca67801ed1c815c
pdf-font-stream PDF embedded font (sfnt) at offset 0x70FA 5336 bytes
font_01_sfnt_off0000833c.bin
e19942c25005d502cba2fa335857042095e0ea411e5e13f8dd2c63244a96b26c
pdf-font-stream PDF embedded font (sfnt) at offset 0x833C 10120 bytes
font_02_sfnt_off0000a5d4.bin
cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34
pdf-font-stream PDF embedded font (sfnt) at offset 0xA5D4 4324 bytes