Malicious PDF — malware analysis report

Static analysis result for SHA-256 0384454314458b19…

MALICIOUS

PDF

33.8 KB Created: 2020-09-24 19:57:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0028fd3eb28499c68663f60224ea58d3 SHA-1: 045007f12b8aaeeb17fce04459396c160c679947 SHA-256: 0384454314458b1998ddb49994c3d82cdf81ea913f8a22f171dbf3ca10202103
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains a significant number of embedded URLs, many of which point to a link farm hosted on Shopify. One critical heuristic identified a link to known malicious redirector infrastructure. The ML classifier also strongly indicated maliciousness. The primary attack pattern appears to be SEO poisoning or a link farm designed to redirect users to potentially harmful content.

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.cc/pify?keyword=map+of+ancient+egypt+ks2
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/0843/4077/files/golizu.pdf
    • https://cdn.shopify.com/s/files/1/0438/1828/7266/files/environmental_and_social_management_system_template.pdf
    • https://cdn.shopify.com/s/files/1/0428/3655/7987/files/15921737616.pdf
    • https://cdn.shopify.com/s/files/1/0483/0753/6034/files/how_many_states_age_of_consent_16.pdf
    • https://cdn.shopify.com/s/files/1/0431/7937/6798/files/local_anesthesia_pharmacology.pdf
    • https://cdn.shopify.com/s/files/1/0431/6246/8514/files/amelie_notes_piano.pdf
    • https://cdn.shopify.com/s/files/1/0430/3136/3747/files/ibps_so_agriculture_officer_study_material.pdf
    • https://cdn.shopify.com/s/files/1/0433/7372/3800/files/petomovomikavet.pdf
    • https://cdn.shopify.com/s/files/1/0431/0463/2998/files/brick_manufacturing_process.pdf
    • https://cdn.shopify.com/s/files/1/0464/5031/1336/files/2019_calendar_template_australia_free.pdf
    • https://cdn.shopify.com/s/files/1/0437/4750/8385/files/apgar_scale.pdf
    • https://cdn.shopify.com/s/files/1/0429/2804/6233/files/from_genes_to_genomes_hartwell.pdf
    • https://cdn.shopify.com/s/files/1/0434/4807/4405/files/reporting_phishing_scams_to_police.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_off00004685.bin
c47c692ba5d3543d14ed3e3e8a3dcfa53f2bcd60e46053f638577543de9ace8d
pdf-font-stream PDF embedded font (sfnt) at offset 0x4685 5356 bytes
font_01_sfnt_off000058fc.bin
2e986c7e8e3f1e51902685bb2bd63118849f11b5f3ec4bce9c0f8801ac4937d3
pdf-font-stream PDF embedded font (sfnt) at offset 0x58FC 9820 bytes