Malicious PDF — malware analysis report

Static analysis result for SHA-256 6efbbea789ed718a…

MALICIOUS

PDF

41.2 KB Created: 2020-07-30 15:25:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8b3fb20caaa96a44f0f3ee9fa5a8a23d SHA-1: d8767ff5435cf17a13b2a45f9d72f764acdcf64d SHA-256: 6efbbea789ed718a2c9b9b16cdd2e9306ed361bb77f75b0a2d08d05b18a45a39
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. The ML classifier also strongly indicated maliciousness. The document body, though heavily obfuscated, appears to be a lure related to 'Jurnal politik malaysia pdf', suggesting a phishing or content-scraping motive. The presence of embedded URLs and the redirector link indicate an attempt to lead the user to 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.cc/pify?keyword=jurnal+politik+malaysia+pdf
    • http://files.somebodyelsesjournal.com/uploads/1/3/0/9/130969371/siwefubitore.pdf
    • http://files.aurorapanonica.com/uploads/1/3/2/7/132740620/6253536.pdf
    • http://files.briarcreeksportsmanclub.com/uploads/1/3/1/8/131871466/kiraxagoxi_wabuzero.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0428/1230/9671/files/konekezevata.pdf
    • https://cdn.shopify.com/s/files/1/0430/1042/4985/files/54088940866.pdf
    • https://cdn.shopify.com/s/files/1/0434/4463/3756/files/guposemujuz.pdf
    • https://cdn.shopify.com/s/files/1/0428/5336/7975/files/zuvemitiro.pdf
    • https://cdn.shopify.com/s/files/1/0430/9634/2695/files/rexenufudafav.pdf
    • https://cdn.shopify.com/s/files/1/0430/8949/4177/files/8796096470.pdf
    • https://cdn.shopify.com/s/files/1/0432/3501/6863/files/jasogodafusomelawum.pdf
    • https://cdn.shopify.com/s/files/1/0433/5511/1589/files/fifonologafowuj.pdf
    • https://cdn.shopify.com/s/files/1/0431/2891/4087/files/35744935636.pdf
    • https://cdn.shopify.com/s/files/1/0428/1604/5222/files/tiposedoros.pdf
    • https://cdn.shopify.com/s/files/1/0428/6644/2406/files/55158690337.pdf
    • https://cdn.shopify.com/s/files/1/0431/3025/7568/files/50582023466.pdf
    • https://cdn.shopify.com/s/files/1/0431/7616/5536/files/15605378981.pdf
    • https://cdn.shopify.com/s/files/1/0432/5851/1510/files/86700381276.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_off000064e4.bin
f5474e4521c15d5a29b5a3f0e3ab7c1ec0065ce62facc7c9b151a237b5f8e1b0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x64E4 5108 bytes
font_01_sfnt_off00007627.bin
f1465533501fe13d84499c6b06d59857e35ef9343726727797007814f06c1fa7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7627 9732 bytes

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