Malicious PDF — malware analysis report

Static analysis result for SHA-256 009b52429db42d2f…

MALICIOUS

PDF

46.9 KB Created: 2020-08-17 09:23:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 868039bc7a576fe3bc2444cba215e05d SHA-1: dee0c74f2914e08c96a0f4be6f5cde6cd4340717 SHA-256: 009b52429db42d2f361813991bf66a144b3ba4244de2090341689c8309b596bc
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a large number of embedded links, many of which point to external resources, including a known malicious redirector. The document body, though partially corrupted, contains text suggesting a lure to engage the user with a question and links. The ML classifier strongly indicates maliciousness, and the PDF_MALICIOUS_REDIRECTOR_LINK heuristic confirms the presence of a link to known malicious infrastructure.

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=can+you+solve+this+30+correct+answer
    • http://files.graceub.com/uploads/1/3/2/6/132681404/6733747.pdf
    • http://files.totnessvintage.com/uploads/1/3/2/6/132683267/panadiwiz.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0438/0744/1053/files/82158909887.pdf
    • https://cdn.shopify.com/s/files/1/0430/7641/9744/files/81363891791.pdf
    • https://cdn.shopify.com/s/files/1/0432/8236/6624/files/cavendish_school_ofsted_report_2017.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/40035930655.pdf
    • https://cdn.shopify.com/s/files/1/0434/1432/3356/files/wuropegufixolowijosela.pdf
    • https://cdn.shopify.com/s/files/1/0437/6982/3383/files/lupobajuvojikoduma.pdf
    • https://cdn.shopify.com/s/files/1/0440/6276/9302/files/76493726116.pdf
    • https://cdn.shopify.com/s/files/1/0430/2218/8701/files/82212337620.pdf
    • https://cdn.shopify.com/s/files/1/0431/5214/6586/files/59223846547.pdf
    • https://cdn.shopify.com/s/files/1/0429/8535/7463/files/50787939058.pdf
    • https://cdn.shopify.com/s/files/1/0432/0477/2000/files/rijewitositinatufezojexo.pdf
    • https://cdn.shopify.com/s/files/1/0430/5181/0969/files/64130775144.pdf
    • https://cdn.shopify.com/s/files/1/0433/4357/7246/files/anhalteweg_bremsweg_reaktionsweg_faustformel.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000060ee.bin
1bbdb026e26ade74a4365f3d0668bc1214c24edc0e49f5dd492236093ffd04b8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x60EE 5352 bytes
font_01_sfnt_off00007334.bin
12af0acdb58fc336921d86e9daa186efe741c7ea44cc10206978086b1ea53558		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7334 11172 bytes
font_02_sfnt_off00009923.bin
f7f944af48a1f29a4fc81369acbb7667dc0c0bb312d09d0e658341ed730dbf86		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9923 16144 bytes

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