Malicious PDF — malware analysis report

Static analysis result for SHA-256 032353398e249d59…

MALICIOUS

PDF

51.0 KB Created: 2020-10-18 23:04:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 135c581fef4e495791428615e60f5f7d SHA-1: 208ac901759c5a6b91c835d8d9a377640d384383 SHA-256: 032353398e249d59c0def32b13b9b54ecd365a41800644a92149a7f75c71fee6
154 Risk Score

Malware Insights

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

The PDF contains a high number of embedded links, many of which point to a link farm designed to generate traffic. One critical heuristic identified a link to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains a URL that likely serves as the initial lure. No scripts were extracted, but the presence of numerous external links suggests a downloader or redirector pattern.

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.club/123?keyword=more+whatsapp+apk+download In PDF document text
    • https://fevixivosetakub.weebly.com/uploads/1/3/2/6/132681861/sidojeloxe_zatonimexawigup.pdfIn PDF document text
    • https://xojerajap.weebly.com/uploads/1/3/1/3/131384359/5ed5dc07.pdfIn PDF document text
    • https://jaserasozupog.weebly.com/uploads/1/3/1/4/131454215/636913.pdfIn PDF document text
    • https://nogafuku.weebly.com/uploads/1/3/2/8/132815296/385f16b.pdfIn PDF document text
    • https://zoveponezewuda.weebly.com/uploads/1/3/0/7/130738822/3909426.pdfIn PDF document text
    • https://jiwepurojal.weebly.com/uploads/1/3/0/7/130775762/8626484.pdfIn PDF document text
    • https://fulipevaxavu.weebly.com/uploads/1/3/2/6/132695351/9124cb55f377.pdfIn PDF document text
    • https://walijogopabo.weebly.com/uploads/1/3/0/7/130776167/jesozitufas_bareradikakap_zopan.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381287/normal_5f8c30f5a92d5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366665/normal_5f896d0672e70.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366009/normal_5f8b1a2d3528a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368989/normal_5f8bdf14eb47d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366035/normal_5f86f8a99fdf0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366036/normal_5f87c34113ac3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377928/normal_5f8a93cdf23e6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366034/normal_5f874de854544.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://cdn.shopify.com/s/files/1/0493/1806/8383/files/settings_apk_for_firestick.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0494/7142/2631/files/white_death_movie_2018.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/5453/0197/files/35015433531.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8990/3264/files/twix_mini_calorie_count.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3870/2748/files/petad.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/9230/6846/files/gesabowekovusaliku.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0479/2945/8852/files/pathfinder_shield_of_faith.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007a8b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7A8B 4948 bytes
SHA-256: 71105447bc608a4703e3fc0344e30517eaccd42eedc1e3b7e7916c80a444e0f7
font_01_sfnt_off00008b66.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8B66 10740 bytes
SHA-256: 24282ac937378a7d53bf20aae1a052e638bac60df25845958bfa183d777db82e
font_02_sfnt_off0000b03c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB03C 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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