Malicious PDF — malware analysis report

Static analysis result for SHA-256 12101e20f09b29f0…

MALICIOUS

PDF

39.0 KB Created: 2020-07-30 20:05:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5258c7e157eefe71caa1c1a737b4d5c0 SHA-1: 166113198b9b66bea04c8ab64b69cf6e65056775 SHA-256: 12101e20f09b29f096d88eec01366ccce369c3ccd53d0e7d43225080a94c803d
154 Risk Score

Malware Insights

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

The PDF file was flagged by multiple critical heuristics indicating malicious redirector links and a link farm. The embedded URLs, particularly the one pointing to 'ttraff.com', are associated with malicious redirector infrastructure. While no scripts were explicitly extracted, the PDF structure and numerous embedded links suggest an attempt to lure users to external, potentially malicious, content.

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=postnatal+depression+questionnaire+pdf
    • http://files.jenniferroseheath.com/uploads/1/3/0/7/130739883/rudunozewi.pdf
    • http://files.salittlescholarstutoring.com/uploads/1/3/1/6/131606260/felevavefukub.pdf
    • http://files.heritagegb.org/uploads/1/3/1/4/131483029/putivitujuwe-tazifutuzogid-lupuvaxeme.pdf
    • http://files.publichealthmuseum.org/uploads/1/3/1/4/131483128/3817572.pdf
    • http://files.tosharollins.com/uploads/1/3/1/6/131607232/jodoxajupada-popeb-sujedoz.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0440/1886/0190/files/kametupoban.pdf
    • https://cdn.shopify.com/s/files/1/0434/5623/3638/files/97320135820.pdf
    • https://cdn.shopify.com/s/files/1/0428/2312/3100/files/95541939045.pdf
    • https://cdn.shopify.com/s/files/1/0431/5496/4631/files/nivufumabunujemuxigetapa.pdf
    • https://cdn.shopify.com/s/files/1/0432/7469/8902/files/95722430682.pdf
    • https://cdn.shopify.com/s/files/1/0435/3343/5029/files/maliv.pdf
    • https://cdn.shopify.com/s/files/1/0430/3552/5282/files/87504674409.pdf
    • https://cdn.shopify.com/s/files/1/0434/9358/9142/files/nakalir.pdf
    • https://cdn.shopify.com/s/files/1/0427/6980/9564/files/tuwes.pdf
    • https://cdn.shopify.com/s/files/1/0437/1516/6357/files/nalubizapozigedemanave.pdf
    • https://cdn.shopify.com/s/files/1/0438/4777/8469/files/4263687573.pdf
    • https://cdn.shopify.com/s/files/1/0431/7754/1787/files/jasakepeba.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_off00005c41.bin
b9397ede6a02112c4788c1dfdabb4879a61489d4a91a944154eee40e4e519f23		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5C41 5044 bytes
font_01_sfnt_off00006d65.bin
d69417a2c4b63f09cf10414d75dbf4f5d7367ce65fa54ac566f417048681c196		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6D65 9856 bytes

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