Malicious PDF — malware analysis report

Static analysis result for SHA-256 0a6d561d5bbb83b9…

MALICIOUS

PDF

42.6 KB Created: 2020-08-30 00:01:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f05ec3d8c79bd1f71073fd34d461e8a9 SHA-1: da8be7c91dc3c3a641522d6fd34e9a2f0717af8e SHA-256: 0a6d561d5bbb83b90ac08ae0528a4d73b801fce8afec7b8c601f51473293530b
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one specifically pointing to a known malicious redirector. The ML classifier also strongly indicated maliciousness. The document body and metadata suggest a lure related to 'Fcc id elvat5g instructions', likely intended to trick users into clicking the malicious link.

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/wix?keyword=fcc+id+elvat5g+instructions
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/7005/3784/files/pinopivego.pdf
    • https://cdn.shopify.com/s/files/1/0429/8617/6665/files/10875336880.pdf
    • https://cdn.shopify.com/s/files/1/0431/2409/7191/files/42911197358.pdf
    • https://cdn.shopify.com/s/files/1/0459/1285/0581/files/adobe_photoshop_cs4_download_full_version.pdf
    • https://cdn.shopify.com/s/files/1/0432/7872/9374/files/supikuruvopan.pdf
    • https://static.usrfiles.com/ugd/7f46b5_76fb94a91ed6482196f604d0bb3efe8e.pdf
    • https://static.usrfiles.com/ugd/9e14ca_a7a1da6b4e2a46e89f09c52a5b7ead02.pdf
    • https://cdn.shopify.com/s/files/1/0433/2909/3784/files/mapag.pdf
    • https://cdn.shopify.com/s/files/1/0429/8529/1937/files/vinayaka_bhajana_patalu_telugu.pdf
    • https://cdn.shopify.com/s/files/1/0433/9249/9868/files/mde_jean_anouilh.pdf
    • https://cdn.shopify.com/s/files/1/0432/5369/4626/files/78752591918.pdf
    • https://cdn.shopify.com/s/files/1/0458/1693/8662/files/anbanavan_asaradhavan_adangadhavan_ringtone.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_off000066c4.bin
a7d37a855a99912fbb0937403d09d299d920fc009b79ca41b7b922cf947a08b9
pdf-font-stream PDF embedded font (sfnt) at offset 0x66C4 5244 bytes
font_01_sfnt_off000078ad.bin
8ba8da0cd692d50530afac4bbc5e2b62a1a5ee73cea81c165bd6afddee572710
pdf-font-stream PDF embedded font (sfnt) at offset 0x78AD 10896 bytes