Malicious PDF — malware analysis report

Static analysis result for SHA-256 5b0ca7b9ab83e790…

MALICIOUS

PDF

43.4 KB Created: 2020-10-14 22:15:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 029d11137ce3296f2698979e1ef361b7 SHA-1: bf69c33de3095219c07a96e4bf03e3db3ca56838 SHA-256: 5b0ca7b9ab83e7907e376e4b90e72aa35f52486b1ab2bd0b279400013e03b001
154 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ggtraff.ru, which is disguised with keywords related to an 'auditor general report'. The PDF also hosts a large number of links to other PDFs, many hosted on Shopify, suggesting a link farm or SEO poisoning tactic to increase visibility. 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://ggtraff.ru/pify?keyword=auditor+general+report+2020+ghana+pdf In PDF document text
    • https://mogilifus.weebly.com/uploads/1/3/0/7/130739831/aa92d.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/0612/7003/files/80264266034.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0459/9270/6207/files/68503023658.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0486/0700/2784/files/inch_mm_chart.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/9202/4739/files/96925766841.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/3486/9909/files/sulitebizo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/7265/8842/files/weber_portable_charcoal_grill.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0477/6479/9644/files/ap_seminar_examples.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/9785/2577/files/sun_dolphin_bali_10_ss_scupper_plugs.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6157/5834/files/64139187842.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1373/3534/files/13022105728.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0476/6747/8694/files/baldis_basics_anti_impossible_mod_for_android.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/6223/0685/files/civil_rights_quotes_about_education.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/3295/1446/files/saxijawawoxowepunokozu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2560/4513/files/jukugofonazivadibodadimox.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c695ae71-443e-4666-8d38-424de604955e/ruzatij.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7a65f47b-b086-4b5e-8cf9-6c72d5a6e095/33479980067.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/13a3a629-c394-4595-b3e3-37dfdf371abd/vujunonusejoteb.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006b88.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6B88 5388 bytes
SHA-256: ebd606e6e97ce51203b729ea38779a7928a71e43d023c58626ba66af26b8dc30
font_01_sfnt_off00007dd1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7DD1 10144 bytes
SHA-256: 6e00f1d9318fafabe6d57c7671c07e4fa8cbdc15caa57a84c67ff935412e9eb8

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