Malicious PDF — malware analysis report

Static analysis result for SHA-256 669b3859323ca7be…

MALICIOUS

PDF

52.7 KB Created: 2020-07-30 14:49:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2f14846d66fc11676f8d00e1222f9a27 SHA-1: b141e2f1e193ac8f9b8c7371892eb611669dc22d SHA-256: 669b3859323ca7be677bc562e618083cd0c275b0627b927617de9ea68d5941f1
154 Risk Score

Malware Insights

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

The PDF contains numerous external links, with one specifically pointing to a known malicious redirector. The document body, though heavily obfuscated, suggests a lure related to a 'topographic map PDF'. The presence of embedded URLs and the ML classifier's high confidence indicate malicious intent, likely to redirect users to malicious sites or engage in SEO spam.

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=victoria+topographic+map+pdf
    • http://files.carolynbeckphotography.com/uploads/1/3/2/7/132712115/rudofumumijam.pdf
    • http://files.studioplumpiano.com/uploads/1/3/1/3/131383497/70178f76b.pdf
    • http://files.hoffmannlabradors.com/uploads/1/3/0/7/130740073/sizogapijapuxomuxex.pdf
    • http://files.rogartscouncil.org/uploads/1/3/1/4/131438151/6032011.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/jedajuzosefowi.pdf
    • https://cdn.shopify.com/s/files/1/0435/4621/4564/files/monulutumakolaguwed.pdf
    • https://cdn.shopify.com/s/files/1/0432/8269/4312/files/pijegirixo.pdf
    • https://cdn.shopify.com/s/files/1/0431/0935/1578/files/42218550840.pdf
    • https://cdn.shopify.com/s/files/1/0434/0996/5212/files/69281709131.pdf
    • https://cdn.shopify.com/s/files/1/0432/8649/5397/files/garaxisudusa.pdf
    • https://cdn.shopify.com/s/files/1/0429/9476/1877/files/zexamunusosabiperosufemut.pdf
    • https://cdn.shopify.com/s/files/1/0437/9898/6909/files/datakarekerigevebofez.pdf
    • https://cdn.shopify.com/s/files/1/0437/0336/9878/files/jezamajofadimifa.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/45927795399.pdf
    • https://cdn.shopify.com/s/files/1/0433/9856/1959/files/rimixedatiguvowa.pdf
    • https://cdn.shopify.com/s/files/1/0433/3951/4006/files/42071536101.pdf
    • https://cdn.shopify.com/s/files/1/0434/4188/1253/files/levodoxukanijeto.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007f4a.bin
218615c96ca80467247facc766f9c2f2584948c92711c8aede41886f3cdaaaab		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7F4A 2984 bytes
font_01_sfnt_off000089f9.bin
015cf0483dda9e83d0f9005d0bed72edc07a134cbd0e6d94bc5d8fc08bbcda5a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x89F9 4888 bytes
font_02_sfnt_off00009a91.bin
4445e55f00547e61bae33f975ec82e2ee0d30d595844667b083386a8e446ac54		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9A91 13588 bytes

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