Malicious PDF — malware analysis report

Static analysis result for SHA-256 1132e2ab6331effa…

MALICIOUS

PDF

38.0 KB Created: 2020-08-17 02:58:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c54924130f69dd15077293945bf52d43 SHA-1: 13b249e84052a532828cedbdae8059a9c662e459 SHA-256: 1132e2ab6331effa72b981f7f19e3b88d9d47063761ef750d6b64f622396a093
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one identified as a malicious redirector pointing to 'ttraff.com'. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of external PDF links, suggesting an attempt to generate traffic or distribute content. While no scripts were directly extracted, the PDF structure and embedded links strongly suggest a malicious intent to lure users to potentially harmful websites.

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=buchholz+relay+manual
    • http://wejoj.rram.ca/uploads/1/3/1/8/131856380/fuputalomuf_dagexexifewez.pdf
    • http://sekekes.robintimms.com/uploads/1/3/1/1/131164250/1671237.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/79265304831.pdf
    • https://cdn.shopify.com/s/files/1/0435/2458/7672/files/big_ideas_math_7th_grade.pdf
    • https://cdn.shopify.com/s/files/1/0432/1152/2209/files/synonyms_for_ielts_writing_task_2_download.pdf
    • https://cdn.shopify.com/s/files/1/0437/9744/6816/files/kim_chungha_album.pdf
    • https://cdn.shopify.com/s/files/1/0434/4492/8674/files/pcaob_auditing_standards.pdf
    • https://cdn.shopify.com/s/files/1/0434/3313/2184/files/dasubulute.pdf
    • https://cdn.shopify.com/s/files/1/0438/3745/6534/files/wakizazujivikanulejorig.pdf
    • https://cdn.shopify.com/s/files/1/0432/9409/7576/files/kalphite_king_solo_guide.pdf
    • https://cdn.shopify.com/s/files/1/0431/8278/4676/files/16170400919.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_off00005938.bin
0c39dd98a5a9437ea2a65142346f3943af0592e4460e8d095e1ee274351f9419
pdf-font-stream PDF embedded font (sfnt) at offset 0x5938 5064 bytes
font_01_sfnt_off00006a55.bin
51170c33d4de82c8d7b94ff8d061fecf5336baca7274ad143423f69780026c61
pdf-font-stream PDF embedded font (sfnt) at offset 0x6A55 9768 bytes