Malicious PDF — malware analysis report

Static analysis result for SHA-256 724ca2b9f991ea76…

MALICIOUS

PDF

39.1 KB Created: 2020-08-07 18:49:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2b232bf6efe20c53736764638c506d95 SHA-1: 0a823dce3ef68c4ec537387ccf7df9b6a48a6777 SHA-256: 724ca2b9f991ea7667dae2ed51fc2dfe19e68d693d0c72a18844dbfb47f9ff75
154 Risk Score

Malware Insights

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

The PDF document contains a large number of embedded links, with a critical heuristic firing indicating a link to a known malicious redirector. The document body also contains the same redirector URL, suggesting an attempt to lure users to malicious content. While no scripts were extracted, the sheer volume of links and the presence of a redirector strongly indicate a malicious intent, likely for phishing or SEO spam.

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/pify?keyword=thin+book+of+appreciative+inquiry+pdf
    • http://files.nangreypottery.com/uploads/1/3/0/9/130970003/xowosusamivorev.pdf
    • http://nabipi.bodyessencellc.com/uploads/1/3/0/9/130969465/6d9c50083e66.pdf
    • http://files.michelamclaurin.com/uploads/1/3/0/7/130740563/4377520.pdf
    • http://files.annanelsondaniel.com/uploads/1/3/2/8/132814096/daxuguboxinusamaregi.pdf
    • http://xedew.nyeusiworld.com/uploads/1/3/1/0/131070767/7500964.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0437/7794/9848/files/nintendo_wad_downloads.pdf
    • https://cdn.shopify.com/s/files/1/0431/0417/4233/files/pabunekevav.pdf
    • https://cdn.shopify.com/s/files/1/0432/4245/5207/files/how_do_i_name_my_discord_server.pdf
    • https://cdn.shopify.com/s/files/1/0434/3509/8264/files/vaxikigizupotuxoletijeb.pdf
    • https://cdn.shopify.com/s/files/1/0429/9846/4661/files/16219586750.pdf
    • https://cdn.shopify.com/s/files/1/0430/7134/0698/files/wedadub.pdf
    • https://cdn.shopify.com/s/files/1/0437/5989/4689/files/51277085253.pdf
    • https://cdn.shopify.com/s/files/1/0432/5136/8104/files/nedubexebimasezew.pdf
    • https://cdn.shopify.com/s/files/1/0432/1515/9458/files/rilozidusifozap.pdf
    • https://cdn.shopify.com/s/files/1/0446/0825/8211/files/antibioticos_aminoglicosdeos.pdf
    • https://cdn.shopify.com/s/files/1/0436/7345/2697/files/sedasetopatixeduxeniwu.pdf
    • https://cdn.shopify.com/s/files/1/0431/7865/5903/files/saxejojesisowu.pdf
    • https://cdn.shopify.com/s/files/1/0435/8779/7160/files/130_u.pdf
    • https://cdn.shopify.com/s/files/1/0430/3696/7063/files/vosuperebagogijomibanasid.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_off0000593d.bin
650957f5c931452802d8b49bedf1bb6de9daf81fb44c96af6ce7f37b68bc3828		 pdf-font-stream PDF embedded font (sfnt) at offset 0x593D 5476 bytes
font_01_sfnt_off00006be0.bin
05d7a5ea570cad4ff460b7fc4df332a75220904be3ce41bb2af5fe56661b68f8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6BE0 10380 bytes

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