Malicious PDF — malware analysis report

Static analysis result for SHA-256 70f8aba4eddd61d6…

MALICIOUS

PDF

42.8 KB Created: 2020-08-21 15:14:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f69f3574ea01f1d3e9ad029948a8d351 SHA-1: 920064c30aca981ff3e37b776fefdb8dd3aadbe6 SHA-256: 70f8aba4eddd61d6178b1c45521869ff74ecf58d3e88a81f15b2dc4c3f01acfb
154 Risk Score

Malware Insights

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

The PDF contains a mass of external links, many pointing to Shopify domains, but one critical link redirects to a known malicious infrastructure at ttraff.com. This suggests the document is designed to act as a link farm, potentially leading users to malicious content or phishing sites. The presence of embedded URLs and the ML classifier's high confidence further support this assessment.

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.com/pify?keyword=la+presse+mobile+apk
    • http://files.furnitureinthemaking.com/uploads/1/3/2/7/132741110/e2fa9e5682a0f.pdf
    • http://mivix.logisticaproductiva.com/uploads/1/3/1/4/131452883/a576765d39e55.pdf
    • http://lumoluvi.barbershopharmonynorfolk.org/uploads/1/3/0/7/130775169/wumesezidaralin-numeruvorudu-femamo-niwadofepixujun.pdf
    • http://files.braverybox.com/uploads/1/3/0/7/130775228/denuxisamojajovolo.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0432/5982/2244/files/89064982574.pdf
    • https://cdn.shopify.com/s/files/1/0437/0428/7383/files/78332973004.pdf
    • https://cdn.shopify.com/s/files/1/0435/6577/7059/files/introduction_to_electrodynamics_4th_edition_solutions.pdf
    • https://cdn.shopify.com/s/files/1/0437/5809/2439/files/94178279550.pdf
    • https://cdn.shopify.com/s/files/1/0435/5253/8773/files/dell_inspiron_n5110_drivers.pdf
    • https://cdn.shopify.com/s/files/1/0446/9224/2588/files/iob_atal_pension_yojana_form.pdf
    • https://cdn.shopify.com/s/files/1/0439/8009/5646/files/56125665568.pdf
    • https://cdn.shopify.com/s/files/1/0436/9232/7077/files/wuvipap.pdf
    • https://cdn.shopify.com/s/files/1/0440/5736/2597/files/andorra_la_vella_mapa.pdf
    • https://cdn.shopify.com/s/files/1/0432/9363/8811/files/speak_now_1_student_book.pdf
    • https://cdn.shopify.com/s/files/1/0427/7082/5382/files/madeira_bird_watching_trip_reports.pdf
    • https://cdn.shopify.com/s/files/1/0434/2916/7270/files/80098519920.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_off00005ec9.bin
d7b3de57a08d007a7159923fe5624222c347ed16b6002230608aeacb1d93b2b3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5EC9 4712 bytes
font_01_sfnt_off00006ebc.bin
8105fa8db12f66fe2a792082a9a32f4cf544ba2ce304e00a63d6d999e47212e9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6EBC 9876 bytes
font_02_sfnt_off0000908b.bin
0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333		 pdf-font-stream PDF embedded font (sfnt) at offset 0x908B 4324 bytes

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