Malicious PDF — malware analysis report

Static analysis result for SHA-256 f5332107521a940c…

MALICIOUS

PDF

33.1 KB Created: 2020-08-17 06:58:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f8ef4e6e9402c48916d923b56af0a915 SHA-1: f0885ae1ed4f54e25a5939afcf574c58aa5297aa SHA-256: f5332107521a940cd89dcec393e3f199c27dd38c5db334e1aaf2133f6be7f8f4
152 Risk Score

Malware Insights

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

The PDF contains a significant number of embedded links, with one identified as a malicious redirector. The document body, though heavily obfuscated, contains the URL to the malicious redirector and several other URLs hosted on Shopify and various other domains. This suggests the primary goal is to lure the user to click on malicious links, likely leading to further compromise.

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=live+weather+report+mexico
    • http://xalud.jamesbev.com/uploads/1/3/0/8/130813765/ritamuvirugunek_funogi_zusobuwiguzitul_tewezugukimabe.pdf
    • http://files.elliemaysgrowingupridgeback.com/uploads/1/3/0/7/130775229/9750771.pdf
    • http://files.perfectlyimperfectcollegian.com/uploads/1/3/0/7/130739069/dobironefivonisalu.pdf
    • http://files.westminsterbible.org/uploads/1/3/1/0/131070192/fofima.pdf
    • http://files.orderaugies.com/uploads/1/3/0/7/130775792/jaxibivatozopi-fuminuxa.pdf
    • https://cdn.shopify.com/s/files/1/0431/4424/9499/files/18930700683.pdf
    • https://cdn.shopify.com/s/files/1/0432/2577/6288/files/south_bend_9_lathe_manual.pdf
    • https://cdn.shopify.com/s/files/1/0433/7437/9164/files/17989458120.pdf
    • https://cdn.shopify.com/s/files/1/0437/3564/6357/files/nukunotena.pdf
    • https://cdn.shopify.com/s/files/1/0432/5366/1851/files/91320700121.pdf
    • https://cdn.shopify.com/s/files/1/0432/9416/3109/files/sokogetoso.pdf
    • https://cdn.shopify.com/s/files/1/0432/2420/3424/files/12414799012.pdf
    • https://cdn.shopify.com/s/files/1/0430/5109/0077/files/17275786895.pdf
    • https://cdn.shopify.com/s/files/1/0431/6374/6465/files/mewekinadulezuramurab.pdf
    • https://cdn.shopify.com/s/files/1/0434/4391/2854/files/mopos.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/87967576867.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/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004673.bin
cdb1cb50bd52180ced2b78c3364eeec43828a5a3712334b93e2fb4481083d1dc
pdf-font-stream PDF embedded font (sfnt) at offset 0x4673 5124 bytes
font_01_sfnt_off000057d4.bin
0843c7035bb046549a11cdeab101c8ed8bba4ebd8d20c2314b220c661ff8d8ba
pdf-font-stream PDF embedded font (sfnt) at offset 0x57D4 9348 bytes