Malicious PDF — malware analysis report

Static analysis result for SHA-256 6c97c0ab899bb1be…

MALICIOUS

PDF

64.6 KB Created: 2020-08-10 05:30:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 545d78e908e334239ffd178256847221 SHA-1: 40cf43b119a76d185f772382148e0a474b732416 SHA-256: 6c97c0ab899bb1be9c9bff408b0e11f2f4e77d52a8606de059593c4855891a03
154 Risk Score

Malware Insights

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

The PDF contains numerous links, with one critical heuristic identifying it as a malicious redirector. The embedded URL `https://ttraff.cc/pify?keyword=al+nahar+journal+algerien+pdf` is a strong indicator of malicious intent, likely leading to a phishing page or malware download. The ML classifier also strongly flagged this PDF as malicious.

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=al+nahar+journal+algerien+pdf
    • http://files.uticalax.org/uploads/1/3/0/7/130775668/bofomavo-rijasekoziw-jimejofo.pdf
    • http://files.barnes1ststepft.com/uploads/1/3/2/6/132681891/zosowadugug.pdf
    • http://dufeli.dandlpring.com/uploads/1/3/2/8/132814930/5812235.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0434/7055/3250/files/walulawufusunedetova.pdf
    • https://cdn.shopify.com/s/files/1/0431/3192/8740/files/19635903574.pdf
    • https://cdn.shopify.com/s/files/1/0432/3350/9534/files/mazanedemoluvolereni.pdf
    • https://cdn.shopify.com/s/files/1/0434/3857/1670/files/61501844403.pdf
    • https://cdn.shopify.com/s/files/1/0431/3631/9639/files/56356325676.pdf
    • https://cdn.shopify.com/s/files/1/0434/8801/8594/files/gukove.pdf
    • https://cdn.shopify.com/s/files/1/0430/5725/0455/files/87671169271.pdf
    • https://cdn.shopify.com/s/files/1/0432/8616/7702/files/16891084141.pdf
    • https://cdn.shopify.com/s/files/1/0437/6333/5319/files/fazarutoxejedalat.pdf
    • https://cdn.shopify.com/s/files/1/0427/7331/5740/files/jirawevukemejezugipomuz.pdf
    • https://cdn.shopify.com/s/files/1/0427/7259/4844/files/46975582918.pdf
    • https://cdn.shopify.com/s/files/1/0430/8054/8503/files/toduratatupenepugoxuvatuf.pdf
    • https://cdn.shopify.com/s/files/1/0432/3000/3357/files/wobufusunasaxo.pdf
    • https://cdn.shopify.com/s/files/1/0440/8662/4406/files/xufogorebufajemix.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://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_006_off0000d5a7.bin
3d6c4656b8816e9e1561938832421de20eda167330882922b013b011ceced25d		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0xD5A7 19368 bytes
font_00_sfnt_off00009de1.bin
46d520900a22364c04c887acb854c8ad4873e15a3e9b7b6272e24190416b5684		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9DE1 5188 bytes
font_01_sfnt_off0000af8b.bin
32b7691f9a5ffcbd45a112f53356a2c7771ca991baeab67b234d5394e27b85c2		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAF8B 11184 bytes

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