Malicious PDF — malware analysis report

Static analysis result for SHA-256 3ab7cd12eb1f8bad…

MALICIOUS

PDF

39.0 KB Created: 2020-10-12 10:18:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 33ba7f25c1c7340f305f6c43fe3bcd62 SHA-1: 2655bd879be539e9a380afeec56dde92be2a1232 SHA-256: 3ab7cd12eb1f8bad6975088fed527ca8c162c888c74d17569e3ddee00451085e
124 Risk Score

Malware Insights

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

The PDF contains embedded links, with one specifically identified as a malicious redirector pointing to 'https://ttraff.ru/pify?keyword=battle+islands+mod+apk+2019'. The document body, though heavily obfuscated, also contains this URL and other links hosted on disposable domains, indicating a link farm strategy. This suggests the file is designed to trick users into clicking malicious links, likely leading to further compromise or unwanted software.

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 is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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=battle+islands+mod+apk+2019 In PDF document text
    • https://site-1039801.mozfiles.com/files/1039801/63560655239.pdfIn PDF document text
    • https://site-1036872.mozfiles.com/files/1036872/96412297754.pdfIn PDF document text
    • https://site-1037003.mozfiles.com/files/1037003/9747576932.pdfIn PDF document text
    • https://site-1037044.mozfiles.com/files/1037044/5512737946.pdfIn PDF document text
    • https://site-1038768.mozfiles.com/files/1038768/sexojemojepukosijuv.pdfIn PDF document text
    • http://janek.collegeprepcoach.org/uploads/1/3/1/4/131406893/niwukuweki-badevajis-bebijikiz-vepusoxakabi.pdfIn PDF document text
    • http://rodawog.urbanedenbeauty.co.uk/uploads/1/3/0/7/130775309/2f7eca41a4982e.pdfIn PDF document text
    • https://site-1037833.mozfiles.com/files/1037833/zobobibaxeletip.pdfIn PDF document text
    • https://site-1038771.mozfiles.com/files/1038771/70567893518.pdfIn PDF document text
    • https://site-1041486.mozfiles.com/files/1041486/torosorede.pdfIn PDF document text
    • https://site-1038919.mozfiles.com/files/1038919/3284152562.pdfIn PDF document text
    • https://site-1037175.mozfiles.com/files/1037175/81642061082.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/1/0434/4283/1522/files/cules_son_los_puntos_cardinales_de_colombia.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0498/7155/2667/files/whirlpool_gold_quiet_partner_ii_manual.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_off00005956.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5956 5604 bytes
SHA-256: 3d23826db92cf5b427883c162f344753e76ee0578bf07ccfcb26e3eb1e29a82f
font_01_sfnt_off00006c50.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6C50 10452 bytes
SHA-256: 7d5f913e2392b1ce91c487b77dcb1850176fabb3543deb839700383108fd975f

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