Malicious PDF — malware analysis report

Static analysis result for SHA-256 504878c83735612c…

MALICIOUS

PDF

60.8 KB Created: 2020-08-11 09:47:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ac8ce6fc7983ef64849a24c41439ab4d SHA-1: 2bfe7c5a32764979f379887a2a6b593b5c5c258b SHA-256: 504878c83735612cd39b58f5ba08daa15079c044f466ba5535a1513b6b1d2f56
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous embedded links, with one specifically pointing to a known malicious redirector. The document body, though heavily obfuscated, contains the text 'Shed plans 10x12 pdf' and the malicious URL, suggesting a lure to trick users into clicking the link. The PDF_MALICIOUS_REDIRECTOR_LINK heuristic confirms the presence of a link to malicious infrastructure.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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.com/pify?keyword=shed+plans+10x12+pdf
    • http://files.peonygiftsandkitchen.co.uk/uploads/1/3/1/4/131453402/1020994.pdf
    • http://kemavomip.themuddybearcat.com/uploads/1/3/0/7/130739826/denine-xozazizoxaw.pdf
    • http://files.nvgws.com/uploads/1/3/1/4/131407012/nujotodobejeg.pdf
    • http://files.theartfulclarke.com/uploads/1/3/2/8/132815807/joxapi-mosokobeve.pdf
    • https://cdn.shopify.com/s/files/1/0434/2946/2177/files/arrival_of_the_birds_spartito_piano.pdf
    • https://cdn.shopify.com/s/files/1/0431/1128/4893/files/61148756652.pdf
    • https://cdn.shopify.com/s/files/1/0432/7076/6750/files/65308219005.pdf
    • https://cdn.shopify.com/s/files/1/0440/6139/3046/files/az_203_study_guide.pdf
    • https://cdn.shopify.com/s/files/1/0435/0436/9816/files/12338760635.pdf
    • https://cdn.shopify.com/s/files/1/0431/7449/4369/files/granite_cave_map.pdf
    • https://cdn.shopify.com/s/files/1/0432/4166/8775/files/ccna_routing_and_switching_espaol.pdf
    • https://cdn.shopify.com/s/files/1/0440/8947/5237/files/brouwer_s_fixed_point_theorem.pdf
    • https://cdn.shopify.com/s/files/1/0437/7922/7810/files/96439048196.pdf
    • https://cdn.shopify.com/s/files/1/0434/4145/5256/files/assistant_loco_pilot_notification_2020.pdf
    • https://cdn.shopify.com/s/files/1/0433/8139/1514/files/fanazeju.pdf
    • https://cdn.shopify.com/s/files/1/0432/4225/8587/files/motocross_madness_2_windows_10.pdf
    • https://cdn.shopify.com/s/files/1/0433/8070/3382/files/brand_audit.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/

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00009312.bin
f793c21a3028d58d53b1312c0baa5cec11602360d79050c1b6b223354748305f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9312 4756 bytes
font_01_sfnt_off0000a36a.bin
f2ac548fe3a7f40495642c0ccb1eec22d5c6284cbbeb141d553fb8fe213326bc		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA36A 5080 bytes
font_02_sfnt_off0000b4a5.bin
d57943cca018cfa48764f54b18a65aa04c3f8dd9ce90cbd67edd19284d4ee84b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB4A5 10412 bytes
font_03_sfnt_off0000d813.bin
a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD813 4324 bytes

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