PDF malware analysis — malicious · b2069ea38362003d

MALICIOUS

PDF

42.1 KB Created: 2020-08-17 08:45:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: 20958c2a138c3455a738d1e2ce6d2fda SHA-1: f46bbf27bdea043c94c14f37578e115bd631927e SHA-256: b2069ea38362003ddb65027751e263434caf5d4b620da0625fa8eee10b969f61

154 Risk Score

Malware Insights

MITRE ATT&CK

T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a link farm and a critical heuristic firing for a malicious redirector, indicating a phishing or scam attempt. The embedded URL 'https://ttraff.ru/pify?keyword=addition+of+similar+and+dissimilar+fractions+worksheets' is the primary indicator of malicious intent, likely serving as a lure to a malicious site. The ML classifier strongly supports the malicious verdict.

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.ru/pify?keyword=addition+of+similar+and+dissimilar+fractions+worksheets
- http://fanana.niagarasuicidepreventioncoalition.com/uploads/1/3/1/6/131606027/d226b03.pdf
- http://files.bearvalleykidscamp.com/uploads/1/3/0/8/130814631/dopoloxigemelo-faxufofawus-lowasilof.pdf
- https://cdn.shopify.com/s/files/1/0432/3924/3943/files/fegopipotefoxa.pdf
- https://cdn.shopify.com/s/files/1/0432/0755/7283/files/belajar_gitar_klasik.pdf
- https://cdn.shopify.com/s/files/1/0458/5426/1401/files/fnma_guidelines_for_mortgage_lates.pdf
- https://cdn.shopify.com/s/files/1/0434/1940/2405/files/virijewatobabedaj.pdf
- https://cdn.shopify.com/s/files/1/0431/6128/8868/files/15483905206.pdf
- https://cdn.shopify.com/s/files/1/0440/4235/4853/files/general_zoology.pdf
- https://cdn.shopify.com/s/files/1/0433/7877/0085/files/carga_electrica_fisica.pdf
- https://cdn.shopify.com/s/files/1/0441/0192/7064/files/inventory_sheet_example.pdf
- https://cdn.shopify.com/s/files/1/0434/3257/5132/files/wategunid.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 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off00006787.bin` `7d2a00904df8685597a97588f29123f11485d6033d6ec2d060f3b78d60b3c175`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x6787	5404 bytes
`font_01_sfnt_off000079c7.bin` `c24652e27808683ab018364b12827442763d40c91061f2c0834e4a87bba4d91e`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x79C7	9836 bytes

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