Malicious PDF — malware analysis report

Static analysis result for SHA-256 6f22fc9fc8721b23…

MALICIOUS

PDF

41.8 KB Created: 2020-08-17 05:05:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8caf01a5c0b9f7b42f275cc574e4b0fd SHA-1: 731c0e72ecf13fa2ba79930dd24d9a24874d9b4c SHA-256: 6f22fc9fc8721b23e6a6d1e676f9e0ee7f1c8de68873cf28cba70de8303c4b5a
154 Risk Score

Malware Insights

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

The PDF contains embedded links, one of which, 'https://ttraff.cc/pify?keyword=spider+man+2+apk+free', is identified as a malicious redirector. The document body and heuristics indicate a lure to download an APK, suggesting a phishing or malware distribution attempt. The presence of numerous external PDF links further supports a link farm strategy, likely to improve search engine ranking for malicious 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=spider+man+2+apk+free
    • http://files.youroasis4health.com/uploads/1/3/1/4/131406663/ziwixol-tevazafulenuxe-lirefam.pdf
    • http://files.paradives.net/uploads/1/3/0/9/130969097/foparotonali.pdf
    • http://files.bikerbabesoaps.com/uploads/1/3/1/3/131380916/tebilimebufi_vawesajuwov_xapenefa_xowoxa.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0432/1555/2672/files/kaxafigeso.pdf
    • https://cdn.shopify.com/s/files/1/0436/8983/6697/files/hs_code_singapore.pdf
    • https://cdn.shopify.com/s/files/1/0431/0961/3725/files/59225591013.pdf
    • https://cdn.shopify.com/s/files/1/0431/0482/9602/files/7332709455.pdf
    • https://cdn.shopify.com/s/files/1/0435/4077/5064/files/81271848712.pdf
    • https://cdn.shopify.com/s/files/1/0435/5863/3631/files/25433886380.pdf
    • https://cdn.shopify.com/s/files/1/0430/4361/8965/files/1473136294.pdf
    • https://cdn.shopify.com/s/files/1/0437/1392/1175/files/60952165997.pdf
    • https://cdn.shopify.com/s/files/1/0434/8801/8594/files/rawujikifasasaperinemozef.pdf
    • https://cdn.shopify.com/s/files/1/0429/1254/6975/files/2004_polaris_sportsman_500_service_manual.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_off000060c7.bin
584f476dbbcf289c96b8e28855f12d648bdf1b25944ade53ebbad64a5a302a64
pdf-font-stream PDF embedded font (sfnt) at offset 0x60C7 5276 bytes
font_01_sfnt_off000072aa.bin
c18d838e28d4ed8ade0ab3048e8fa4b5a4a0bae2cb6ecab9ac250df2e7412efa
pdf-font-stream PDF embedded font (sfnt) at offset 0x72AA 14852 bytes