Malicious PDF — malware analysis report

Static analysis result for SHA-256 00f047fec0e6b07c…

MALICIOUS

PDF

40.8 KB Created: 2020-09-14 08:54:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bffb6d393d007cdb235cf691080fd59a SHA-1: 7d79b957e626c134060ba25a28f8f75f230970f6 SHA-256: 00f047fec0e6b07c91038c33a2f0f377bbc2f50b0b0c5f0a5ee95197df8b83f2
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains multiple embedded links that lead to known malicious redirectors and link farms, as indicated by the PDF_MALICIOUS_REDIRECTOR_LINK and PDF_SEO_LINK_FARM heuristics. The document body, though heavily obfuscated, contains a reference to 'Z fighters apk ios' and a URL that aligns with the malicious redirector findings. The ML classifier also strongly flagged this PDF as malicious.

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/pify?keyword=z+fighters+apk+ios
    • http://sufufir.abvoicestudio.com/uploads/1/3/1/3/131380868/dativor-nikisexulefuluk-gujitelomokodel.pdf
    • http://juluromi.jamiesquibbs.com/uploads/1/3/0/9/130969744/7667381.pdf
    • http://tufavak.beachcitypestcontrol.com/uploads/1/3/1/8/131872225/701cc8c2b4.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0428/2531/8563/files/examples_of_balance_sheet_exercises.pdf
    • https://cdn.shopify.com/s/files/1/0464/8658/5512/files/penuxidefevijar.pdf
    • https://cdn.shopify.com/s/files/1/0461/7273/3603/files/attribution_analysis_report.pdf
    • https://cdn.shopify.com/s/files/1/0428/4540/5350/files/badofopo.pdf
    • https://cdn.shopify.com/s/files/1/0433/6844/8152/files/kepidijodowevodaruvujad.pdf
    • https://static.usrfiles.com/ugd/217d68_4548cbc05d1e4bf78d643c745bbad188.pdf
    • https://static.usrfiles.com/ugd/f65175_f6731cb152c8485db179364deac3ee34.pdf
    • https://static.usrfiles.com/ugd/0c4177_9bc4cc96df084571b4089c0bff5203d9.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_off000060b3.bin
04194982bf412ec195ff560adf47b23c2c5704d3788fce087693f51f47849895
pdf-font-stream PDF embedded font (sfnt) at offset 0x60B3 5152 bytes
font_01_sfnt_off00007244.bin
0e42707c4945fa3e0eb2ff980cfb2bb705ecc37db0fc4aedaf90f3d6e8169fbe
pdf-font-stream PDF embedded font (sfnt) at offset 0x7244 10752 bytes