Malicious PDF — malware analysis report

Static analysis result for SHA-256 972e01d298612b46…

MALICIOUS

PDF

47.1 KB Created: 2020-08-17 13:00:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ef03dcfe9b457edc80a4380a79d17563 SHA-1: aaf2802766e16fbb6c499c9397e765fca5a6726d SHA-256: 972e01d298612b468671669859fedcb77ac62d22fff82e3576e9bde83c01c22e
152 Risk Score

Malware Insights

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

The PDF contains a link farm designed to manipulate search engine results, leading to a malicious redirector at 'https://ttraff.com/pify?keyword=plague+inc+evolved+necroa+virus+guide'. This redirector is likely used to deliver a second-stage payload. The document body, though heavily obfuscated, contains references to 'Plague Inc' and 'necroa virus guide', suggesting a lure to entice users to click the malicious link. The ML classifier strongly supports the malicious nature of this PDF.

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.com/pify?keyword=plague+inc+evolved+necroa+virus+guide
    • http://files.norforkschools.org/uploads/1/3/0/7/130738836/17cd82.pdf
    • http://files.bayfieldcoheritagedays.org/uploads/1/3/2/6/132695701/duvofafutudaj.pdf
    • http://wegomib.ritchielawok.com/uploads/1/3/0/8/130814328/jesizabisara.pdf
    • https://cdn.shopify.com/s/files/1/0432/5559/5172/files/katometavi.pdf
    • https://cdn.shopify.com/s/files/1/0432/3459/0875/files/68103548643.pdf
    • https://cdn.shopify.com/s/files/1/0435/6322/1155/files/50_exercices_pour_avoir_confiance_en_soi.pdf
    • https://cdn.shopify.com/s/files/1/0438/5662/5829/files/zurodelogabul.pdf
    • https://cdn.shopify.com/s/files/1/0440/1420/7134/files/85817713804.pdf
    • https://cdn.shopify.com/s/files/1/0433/9312/2460/files/siwuboravuxixijofizup.pdf
    • https://cdn.shopify.com/s/files/1/0437/0631/9001/files/titovodavado.pdf
    • https://cdn.shopify.com/s/files/1/0428/5107/4214/files/ropoveturomumejipatavuge.pdf
    • https://cdn.shopify.com/s/files/1/0431/0066/8065/files/20056755008.pdf
    • https://cdn.shopify.com/s/files/1/0433/5838/8383/files/11998898057.pdf
    • https://cdn.shopify.com/s/files/1/0429/1854/3523/files/8139476592.pdf
    • https://cdn.shopify.com/s/files/1/0439/2960/0168/files/56230554782.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/sobobubujuwin.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006ca2.bin
af80e61ff13d30a16f07b7c47d653df430b393cdd1d7fb70a0c7fe6b6ad0ec94		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6CA2 4972 bytes
font_01_sfnt_off00007d86.bin
0f2366ad05d456da6db77ffcf150e3320f620a50674395a8a0b8a04bb280a2c4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7D86 10384 bytes
font_02_sfnt_off0000a110.bin
1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA110 4324 bytes

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