Malicious PDF — malware analysis report

Static analysis result for SHA-256 047ae771e0cf3e94…

MALICIOUS

PDF

55.7 KB Created: 2020-08-15 20:44:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9206d87ef9521dcce4a69de10293d0e3 SHA-1: 0a6ae9a19723a065b82e56766349cd6f96604e7e SHA-256: 047ae771e0cf3e9428d9a202956048e533c72da998e8150c2f7354197d465382
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links, with one identified as a malicious redirector. The ML classifier strongly indicated maliciousness. The document body, though heavily obfuscated, contains the malicious redirector URL, suggesting an attempt to lure 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=angular+formarray+setvalue+example
    • http://korafusel.dba-group.co.uk/uploads/1/3/2/3/132303168/kalubujogaxot_givagijipoxobom.pdf
    • http://files.newsomecasting.co.uk/uploads/1/3/0/7/130739996/1510371.pdf
    • http://dixuju.matigrey.com/uploads/1/3/1/4/131454522/pajebajo.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0428/6434/5255/files/tabawet.pdf
    • https://cdn.shopify.com/s/files/1/0433/7955/6504/files/ahsanul_bayan_urdu_darussalam.pdf
    • https://cdn.shopify.com/s/files/1/0436/7895/7718/files/90706844963.pdf
    • https://cdn.shopify.com/s/files/1/0438/0845/6865/files/77582839873.pdf
    • https://cdn.shopify.com/s/files/1/0428/9911/2095/files/wolimiravumaxeriweme.pdf
    • https://cdn.shopify.com/s/files/1/0431/0571/4338/files/cephalometric_analysis_book.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/kemulubu.pdf
    • https://cdn.shopify.com/s/files/1/0432/7315/8821/files/jotovodamapuxu.pdf
    • https://cdn.shopify.com/s/files/1/0437/0877/6599/files/geluviwojuxorowixokove.pdf
    • https://cdn.shopify.com/s/files/1/0437/8093/1742/files/91912472408.pdf
    • https://cdn.shopify.com/s/files/1/0440/2138/3333/files/23885031601.pdf
    • https://cdn.shopify.com/s/files/1/0437/6153/3085/files/juvopozino.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000079fd.bin
924c722fff40323af0217cba51682f531a9c931efa1c492dd58a62b1269b891a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x79FD 5272 bytes
font_01_sfnt_off00008be1.bin
a6a8686b8fb15c9717d15c6992f5cb6599fab98c9eb18a738509255b94a7d84e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8BE1 2252 bytes
font_02_sfnt_off00009621.bin
b2fd996b8822bcbac5ee0f0d8e69b3f10a6dd63af10c71e0d3addc75a6193bf9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9621 14220 bytes
font_03_sfnt_off0000c348.bin
a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC348 4324 bytes

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