Malicious PDF — malware analysis report

Static analysis result for SHA-256 b48ce5c6c6919e74…

MALICIOUS

PDF

47.5 KB Created: 2020-08-12 19:01:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 192cc684fc104ceb8dccf55f4296f10e SHA-1: a6b24880ead132a8e19c54edbb48d1cbe94fbfde SHA-256: b48ce5c6c6919e74364fd644681936d1b2ad6432113c48a2d762951f9fda95d9
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains numerous links, including one pointing to a known malicious redirector (ttraff.com). The document body, though heavily obfuscated, contains the URL that is also present in the heuristic firing. This suggests the PDF is designed to distribute malicious content or lead users to phishing sites. No scripts were extracted from this sample.

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=accounting+assumptions+and+principles+pdf
    • http://rurolero.cocoatreecarbondale.com/uploads/1/3/1/3/131384281/6563684.pdf
    • http://files.ame-geolab.com/uploads/1/3/1/3/131384559/lezajezoju-barivo-rijiba.pdf
    • http://dagibup.tablerockfoundation.org/uploads/1/3/1/4/131438759/fubifasajalido.pdf
    • http://files.dorothykellyacademyofreflexology.com/uploads/1/3/0/9/130969709/kitakiwus.pdf
    • http://suxakuji.davidderr.com/uploads/1/3/0/7/130739615/rixaf.pdf
    • https://cdn.shopify.com/s/files/1/0431/0358/4423/files/90231971439.pdf
    • https://cdn.shopify.com/s/files/1/0430/6819/4978/files/15767407414.pdf
    • https://cdn.shopify.com/s/files/1/0430/9798/1082/files/82789429322.pdf
    • https://cdn.shopify.com/s/files/1/0427/9032/2342/files/rakalojesikafuzazebejura.pdf
    • https://cdn.shopify.com/s/files/1/0431/1659/3312/files/wuvevolonigobidifuzidome.pdf
    • https://cdn.shopify.com/s/files/1/0428/9524/5475/files/86708353319.pdf
    • https://cdn.shopify.com/s/files/1/0430/8667/6135/files/world_map_without_labels.pdf
    • https://cdn.shopify.com/s/files/1/0428/6555/7671/files/befewedo.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/71061356311.pdf
    • https://cdn.shopify.com/s/files/1/0432/4166/8775/files/15823526329.pdf
    • https://cdn.shopify.com/s/files/1/0430/2641/5779/files/ad_d_dm_guide.pdf
    • https://cdn.shopify.com/s/files/1/0432/9262/3001/files/robert_graves_greek_myths.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/medade.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_off00007b88.bin
8b203279361062e7477c43f35335e24f2bcb78fa6f221428523244de27a75181		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7B88 5464 bytes
font_01_sfnt_off00008e03.bin
6f7412e495aee3f12aaec44996ad0803d9380cbbb6ce2484b350edce70c1a703		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8E03 10120 bytes

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