MALICIOUS
154
Risk Score
Malware Insights
MITRE ATT&CK
T1566.002 Spearphishing Attachment
T1059.001 PowerShell
T1204.002 Malicious Link
The PDF contains a link disguised as a "Microsoft machine learning algorithms cheat sheet" that redirects to a malicious URL. The heuristic PDF_MALICIOUS_REDIRECTOR_LINK confirms this behavior. The document body itself is heavily obfuscated but contains the malicious URL, indicating a lure to redirect the user to potentially harmful content. The presence of numerous other PDF links suggests a link farm strategy to improve search engine ranking for malicious content.
Machine Learning
- Nyx PDF Classifier malicious score 1.0000
Heuristics 4
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PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINKPDF 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.
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Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARMSmall 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.
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Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTALThe 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.
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Embedded URL info EMBEDDED_URLOne 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=microsoft+machine+learning+algorithms+cheat+sheet
- http://files.randirouge.com/uploads/1/3/1/4/131408537/7877400.pdf
- http://files.summerfoxart.com/uploads/1/3/0/7/130776082/vudidaniwenirid.pdf
- https://cdn.shopify.com/s/files/1/0434/9899/5864/files/rolapemevokujudal.pdf
- https://cdn.shopify.com/s/files/1/0434/6930/8061/files/3891192071.pdf
- https://cdn.shopify.com/s/files/1/0430/6396/7906/files/87950619898.pdf
- https://cdn.shopify.com/s/files/1/0437/4164/2906/files/wujalisixinepu.pdf
- https://cdn.shopify.com/s/files/1/0433/0687/7080/files/54729765263.pdf
- https://cdn.shopify.com/s/files/1/0433/0687/7080/files/gerakofidasetivivirodipel.pdf
- https://cdn.shopify.com/s/files/1/0429/2083/7279/files/gunolimetejekosowosizopul.pdf
- https://cdn.shopify.com/s/files/1/0431/8189/9944/files/fexilapuxabefokagisipe.pdf
- https://cdn.shopify.com/s/files/1/0431/0538/6647/files/78562288109.pdf
- https://cdn.shopify.com/s/files/1/0430/5548/0981/files/bohemian_rhapsody_piano_4_hands.pdf
- https://cdn.shopify.com/s/files/1/0435/5804/3797/files/sell_5th_edition.pdf
- https://cdn.shopify.com/s/files/1/0427/8085/2383/files/active_passive_exercises_mixed_tenses.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_off00006116.bin300095eb9cef4fc2cc3145bf2fa30392ec841626b125b867e8b70df822aad8a1 |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x6116 | 5300 bytes |
font_01_sfnt_off000072f8.bin02d7cc8dbb09900f7b51056bea14ed7dc07ebc350189a4ad80107a491943190f |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x72F8 | 9852 bytes |
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