Malicious PDF — malware analysis report

Static analysis result for SHA-256 78a6e1f0e6d1b333…

MALICIOUS

PDF

43.5 KB Created: 2020-08-05 09:49:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8d57936f6c30ac351d957e4b7a38104f SHA-1: db5c0e3ff9e66b87ccba7cf1fa0f54cf14a0f0c5 SHA-256: 78a6e1f0e6d1b333d3fe9ba56845ee84031435acb474aadacefc9ad2bf55271a
154 Risk Score

Malware Insights

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

The PDF contains a lure for a "Bharat ratna award 2020 pdf download" which, when clicked, redirects to the malicious URL https://ttraff.com/pify. This URL is flagged as a known malicious redirector. The document also contains a large number of links to other PDFs, suggesting a link farm or SEO manipulation tactic. The ML classifier strongly indicates maliciousness.

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=bharat+ratna+award+2020+pdf+download
    • http://files.rosekyungwonkim.com/uploads/1/3/1/4/131453555/0c4f872bcd.pdf
    • http://kuwolug.yorkmorris.com/uploads/1/3/1/8/131857315/cc2ccf43.pdf
    • http://tozuf.carrscoins.com/uploads/1/3/1/4/131453060/d064a718e3bf304.pdf
    • http://files.astoriabeneficialclub.org/uploads/1/3/1/8/131858592/fupinuzadirokap-zatadadabuf-tilowudas.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/rodol.pdf
    • https://cdn.shopify.com/s/files/1/0433/1234/9334/files/josawetivudubalubixazeto.pdf
    • https://cdn.shopify.com/s/files/1/0434/0681/9493/files/pezukujiluxezusutanuju.pdf
    • https://cdn.shopify.com/s/files/1/0431/5404/7137/files/banavipubugasimipuwegafaj.pdf
    • https://cdn.shopify.com/s/files/1/0427/6482/8838/files/43035173689.pdf
    • https://cdn.shopify.com/s/files/1/0432/4301/2256/files/makalah_tentang_bblr.pdf
    • https://cdn.shopify.com/s/files/1/0440/0765/3526/files/39379489082.pdf
    • https://cdn.shopify.com/s/files/1/0432/8249/7696/files/47569065091.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/9959313526.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/12729031526.pdf
    • https://cdn.shopify.com/s/files/1/0434/0944/0917/files/zokivejikukifexif.pdf
    • https://cdn.shopify.com/s/files/1/0430/3018/4098/files/github_terminal_commands.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_off00006b79.bin
0d0536a523f8e265f32b0e545807c2079af56f8c4703f95e733b0dcefe0cc14a
pdf-font-stream PDF embedded font (sfnt) at offset 0x6B79 5368 bytes
font_01_sfnt_off00007dc8.bin
62db54a17558443a2f658a381693362ef600a53636200ae6ced39582e48fec67
pdf-font-stream PDF embedded font (sfnt) at offset 0x7DC8 10312 bytes