Malicious PDF — malware analysis report

Static analysis result for SHA-256 035114d42110e4ad…

MALICIOUS

PDF

51.1 KB Created: 2020-09-12 09:42:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d83a66a913222cecea0617acd2ab56ae SHA-1: 59085d84e9ca0c7f903062afa1d76115e4ddf0dd SHA-256: 035114d42110e4adfd741845b1bf284c65e38f5676bd53bc7ee00fb98d9fe5d9
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with the primary one redirecting to a known malicious infrastructure. The ML classifier strongly indicated maliciousness, and the PDF structure suggests a link farm designed to distribute traffic to potentially malicious sites. Although no scripts were directly extracted, the PDF's nature implies it's intended to deliver users to malicious content, likely as a phishing or malware distribution lure.

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.me/pify?keyword=endothermic+or+exothermic+worksheet
    • http://genupu.jamesferris.ca/uploads/1/3/1/4/131437930/09f59.pdf
    • http://files.jameskallembach.com/uploads/1/3/1/6/131606335/wujupisosimawela.pdf
    • http://pukaloxi.countryriskprofiles.com/uploads/1/3/2/6/132695829/lubesinox.pdf
    • http://ximines.learningexchanges.org/uploads/1/3/0/7/130775565/9604509.pdf
    • http://files.transfiguration-mtl.org/uploads/1/3/0/7/130775665/e7a726193d695ac.pdf
    • http://raruxir.4dvast.com/uploads/1/3/1/3/131382595/jatumoxovutametakig.pdf
    • http://files.maryimmaculategallatin.org/uploads/1/3/2/7/132740905/vidizakokubevawi.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0432/3786/7687/files/ugk_international_players_anthem.pdf
    • https://cdn.shopify.com/s/files/1/0435/3510/6203/files/every_praise_is_to_our_god_lyrics.pdf
    • https://cdn.shopify.com/s/files/1/0432/3105/1931/files/introduction_to_calculus_volume_1.pdf
    • https://cdn.shopify.com/s/files/1/0462/4436/4448/files/videoder_apk_for_android_2._3._6.pdf
    • https://static.usrfiles.com/ugd/3ab5ed_706bdf08c9684bdca39216c893360c2d.pdf
    • https://static.usrfiles.com/ugd/5b9365_584ecc66a64f44ec92bf0c8e64c60f14.pdf
    • https://static.usrfiles.com/ugd/b8c837_760f2e9d855641ee95ef767bd6cd136c.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007fe4.bin
4aba2bb845853324476be69e5ed1bf4ff35002942389efac2b843cac1129f0e9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7FE4 2828 bytes
font_01_sfnt_off000089df.bin
7d1200b942747908376a49ed7f2bcbc0322d759dd4ae7282e5a0ed6508db5fdc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x89DF 5116 bytes
font_02_sfnt_off00009b35.bin
53cfcf4c52a35fb6af7b17dd81fb6781b39fd60661ca9e6b3fa27f007225dceb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9B35 9940 bytes

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